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Merge pull request #4 from srekan/conditional-statements
Conditional statements
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‎conditional-statements/README.md

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# Go Programming Exercises: if else statements
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- [Program to find maximum between two numbers](max_of_two_numbers.go)
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- [Program to find maximum between two numbers using functions](max_of_two_numbers_using_functions.go)
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- [Program to find maximum between three numbers](max_of_three_numbers.go)
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- [Program to find maximum between three numbers using functions](max_of_three_numbers_using_functions.go)
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- [Program to check whether a number is negative, positive or zero](find_number_sign.go)
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- [Program to check whether a number is divisible by 5 and 11 or not](is_divisible_by_5_and_11.go)
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- [Program to check whether a number is divisible by 5 and 11 or not using boolean operators](is_divisible_by_5_and_11_using_functions_using_bool.go)
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- [Program to check whether a number is even or odd](is_even_or_odd.go)
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- [Program to check whether a year is leap year or not](is_leap_year.go)
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- [Program to input any character and check whether it is alphabet, digit or special character](is_alphabet_or_digit.go)
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- [Program to input any alphabet and check whether it is vowel or consonant](is_vowel.go)
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- [Program to check whether a character is uppercase or lowercase alphabet](is_upper_case.go)
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- [Program to input week number and print week day](print_week_day.go)
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- [Program to input week number and print week day using switch](print_week_day_using_switch.go)
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- [Program to input week number and print week day using an array](print_week_day_using_array.go)
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- [Program to input month number and print month name and number of days in that month](days_of_month.go)
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- [Program to input month number and print month name and number of days in that month using a map](days_of_month_using_map.go)
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- [Program to input angles of a triangle and check whether triangle is valid or not](is_valid_triangle.go)
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- [Program to check whether the triangle is equilateral, isosceles or scalene triangle](get_triangle_type.go)
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## To be written
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- Program to find all roots of a quadratic equation
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- Program to calculate profit or loss
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- Program to input marks of five subjects Physics, Chemistry, Biology, Mathematics and Computer. Calculate percentage and grade according to following:
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* Percentage >= 90% : Grade A
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* Percentage >= 80% : Grade B
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* Percentage >= 70% : Grade C
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* Percentage >= 60% : Grade D
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* Percentage >= 40% : Grade E
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* Percentage < 40% : Grade F
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- Program to input basic salary of an employee and calculate its Gross salary according to following:
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* Basic Salary <= 10000 : HRA = 20%, DA = 80%
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* Basic Salary <= 20000 : HRA = 25%, DA = 90%
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* Basic Salary > 20000 : HRA = 30%, DA = 95%
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- Program to input electricity unit charges and calculate total electricity bill according to the given condition:
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* For first 50 units Rs. 0.50/unit
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* For next 100 units Rs. 0.75/unit
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* For next 100 units Rs. 1.20/unit
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* For unit above 250 Rs. 1.50/unit
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* An additional surcharge of 20% is added to the bill

‎conditional-statements/days_of_month.go

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package main
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import "fmt"
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func main(){
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var n int
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fmt.Print("Enter month number(1 - 12): ")
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fmt.Scan(&n)
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switch n {
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case 1, 3, 5, 7, 8, 10, 12:
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fmt.Println("31 days")
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case 2:
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fmt.Println("28/29 days")
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case 4, 6, 9, 11:
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fmt.Println("30 days")
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default:
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fmt.Println("Please enter a valid value between 1 and 12")
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}
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}
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/** Outputs
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$ go run days_of_month.go
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Enter month number(1 - 12): 5
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31 days
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$ go run days_of_month.go
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Enter month number(1 - 12): 2
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28/29 days
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$ go run days_of_month.go 13
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Enter month number(1 - 12): 13
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Please enter a valid value between 1 and 12
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*/

‎conditional-statements/days_of_month_using_map.go

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package main
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import "fmt"
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func main(){
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type Month struct {
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name string
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days int
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}
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monthsMap := map[int]Month{
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1: { name: "January", days: 31 },
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2: { name: "February", days: 28 },
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3: { name: "March", days: 31 },
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4: { name: "April", days: 30 },
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5: { name: "May", days: 31 },
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6: { name: "June", days: 30 },
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7: { name: "July", days: 31 },
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8: { name: "August", days: 31 },
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9: { name: "September", days: 30 },
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10: { name: "October", days: 31 },
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11: { name: "November", days: 30 },
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12: { name: "December", days: 31 },
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}
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var n int
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fmt.Print("Enter month number(1 - 12): ")
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fmt.Scan(&n)
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if monthsMap[n].name != "" {
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fmt.Printf("%s - %d days\n", monthsMap[n].name, monthsMap[n].days)
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} else {
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fmt.Println("Please enter a valid value between 1 and 12")
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}
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}
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/** Outputs
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$ go run days_of_month_using_map.go
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Enter month number(1 - 12): 6
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June - 30 days
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$ go run days_of_month_using_map.go
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Enter month number(1 - 12): 66
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Please enter a valid value between 1 and 12
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*/

‎conditional-statements/find_number_sign.go

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package main
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import "fmt"
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func main(){
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var n int
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fmt.Print("Enter an integer: ")
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fmt.Scan(&n)
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if(n == 0){
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fmt.Println("Given number is zero")
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} else if(n > 0){
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fmt.Println("Given number is positive")
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} else{ /* if(n < 0) // Default case*/
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fmt.Println("Given number is negative")
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}
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}
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/** Outputs
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$ go run find_number_sign.go
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Enter an integer: 10
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Given number is positive
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$ go run find_number_sign.go
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Enter an integer: -10
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Given number is negative
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$ go run find_number_sign.go
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Enter an integer: 0
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Given number is zero
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*/

‎conditional-statements/get_triangle_type.go

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package main
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import "fmt"
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func getTriangleType(side1, side2, side3 float64)string{
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if(side1 == side2 && side2 == side3){
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return "EQUILATERAL triangle"
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}
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if(side1 == side2 || side2 == side3 || side3 == side1){
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return "ISOSCELES triangle"
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}
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return "SCALENE triangle" // this is the remaining case after the aboce two cases
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}
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func main(){
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var side1, side2, side3 float64
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fmt.Print("Enter first side: ")
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fmt.Scan(&side1)
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fmt.Print("Enter second second: ")
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fmt.Scan(&side2)
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fmt.Print("Enter third third: ")
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fmt.Scan(&side3)
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fmt.Println(getTriangleType(side1, side2, side3))
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}
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/** Output
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$ go run get_triangle_type.go
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Enter first side: 10
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Enter second second: 10
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Enter third third: 10
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EQUILATERAL triangle
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$ go run get_triangle_type.go
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Enter first side: 10
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Enter second second: 10
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Enter third third: 20
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ISOSCELES triangle
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$ go run get_triangle_type.go
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Enter first side: 10
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Enter second second: 20
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Enter third third: 30
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SCALENE triangle
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*/

‎conditional-statements/is_alphabet_or_digit.go

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/*
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ASCII codes
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0 : 48
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9 : 57
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A : 65
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B : 66
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Z : 90
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a : 97
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b : 98
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z : 122
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*/
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package main
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import (
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"fmt"
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"bufio"
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"os"
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)
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func main(){
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reader := bufio.NewReader(os.Stdin)
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fmt.Print("Enter a character: ")
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char, _, err := reader.ReadRune()
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if err != nil {
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fmt.Println(err)
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}
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if (char >= 'a' && char <= 'z') || (char >= 'A' && char <= 'Z') {
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fmt.Println("Given character is an alphabet")
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} else if char >= '0' && char <= '9' {
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fmt.Println("Given character is a digit")
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}
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/*
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// Method 2: compare with ascii values
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if (char >= 65 && char <= 122) || (char >= 97 && char <= 90) {
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fmt.Println("Given character is an alphabet")
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} else if char >= 48 && char <= 57 {
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fmt.Println("Given character is a digit")
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}
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*/
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}
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/** Outputs
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$ go run is_alphabet_or_digit.go
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Enter a character: a
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Given character is an alphabet
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$ go run is_alphabet_or_digit.go
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Enter a character: G
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Given character is an alphabet
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$ go run is_alphabet_or_digit.go
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Enter a character: 5
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Given character is a digit
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*/

‎conditional-statements/is_divisible_by_5_and_11.go

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package main
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import "fmt"
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func main(){
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var n int
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fmt.Print("Enter a number: ")
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fmt.Scan(&n)
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if(n % 5 == 0){
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if(n % 11 == 0){
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fmt.Println("The given number is divisible by both 5 and 11")
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} else {
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fmt.Println("The given number is divisible by 5, but not 11")
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}
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} else {
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if(n % 11 == 0){
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fmt.Println("The given number is divisible by 11, but not 5")
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} else {
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fmt.Println("The given number is not divisible by 5 and 11")
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}
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}
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}
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/** Outputs
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$ go run is_divisible_by_5_and_11.go
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Enter a number: 55
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The given number is divisible by both 5 and 11
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$ go run is_divisible_by_5_and_11.go
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Enter a number: 22
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The given number is divisible by 11, but not 5
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$ go run is_divisible_by_5_and_11.go
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Enter a number: 25
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The given number is divisible by 5, but not 11
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$ go run is_divisible_by_5_and_11.go
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Enter a number: 13
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The given number is not divisible by 5 and 11
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*/

‎conditional-statements/is_divisible_by_5_and_11_using_functions_using_bool.go

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package main
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import "fmt"
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func main(){
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var n int
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fmt.Print("Enter a number: ")
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fmt.Scan(&n)
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if(n % 5 == 0 && n % 11 == 0){
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fmt.Println("The given number is divisible by both 5 and 11")
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}
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if(n % 5 == 0 && n % 11 != 0){
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fmt.Println("The given number is divisible by 5, but not 11")
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}
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if(n % 5 != 0 && n % 11 == 0){
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fmt.Println("The given number is divisible by 11, but not 5")
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}
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if(n % 5 != 0 && n % 11 != 0){
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fmt.Println("The given number is not divisible by 5 and 11")
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}
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}
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/** Outputs
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$ go run is_divisible_by_5_and_11.go
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Enter a number: 55
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The given number is divisible by both 5 and 11
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$ go run is_divisible_by_5_and_11.go
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Enter a number: 22
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The given number is divisible by 11, but not 5
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$ go run is_divisible_by_5_and_11.go
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Enter a number: 25
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The given number is divisible by 5, but not 11
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$ go run is_divisible_by_5_and_11.go
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Enter a number: 13
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The given number is not divisible by 5 and 11
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*/

‎conditional-statements/is_even_or_odd.go

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package main
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import "fmt"
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func main(){
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var n int
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fmt.Print("Enter a number: ")
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fmt.Scan(&n)
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if(n % 2 == 0){
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fmt.Println("Given number is even")
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} else {
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fmt.Println("Given number is odd")
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}
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}
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/** Outputs
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$ go run is_even_or_odd.go
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Enter a number: 2
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Given number is even
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$ go run is_even_or_odd.go
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Enter a number: 3
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Given number is odd
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$ go run is_even_or_odd.go
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Enter a number: 0
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Given number is even
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*/

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