Merge pull request #1 from srekan/basic

Basic

Author: srekan

basic/README.md

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+# Golang Programming exercises: Basic
+- [Sum of two numbers](sum_of_two_numbers.go)
+- [Arithmetic operations](arithmetic_operations.go)
+- [Input from user](input_from_user.go)
+- [Accept length and breadth of a rectangle. Then find perimeter and area of a rectangle](rectangle_area_and_perimeter.go)
+- [Accept radius of a circle. Then find diameter and circumference of a circle](circle_diameter_and_circumference.go)
+- [Accept temperature in Celsius and convert it into Fahrenheit.](celsius_to_fahrenheit.go)
+- [Program to convert days into years, weeks and days](days_to_years.go)
+- [Program to enter two angles of a triangle and find the third angle](third_angle_of_triangle.go)
+- [Program to enter base and height of a triangle and find its area](area_of_triangle.go)
+- [Program to calculate area of an equilateral triangle](area_of_equilateral_triangle.go)
+- [Program to find power of any number x ^ y](power_of_a_number.go)
+- [Program to enter marks of five subjects and calculate total, average and percentage](student_marks.go)
+- [Program to enter P, N, R and calculate Simple Interest](simple_interest.go)
+- [Program to enter P, N, R and calculate Compound Interest](compound_interest.go)

basic/area_of_equilateral_triangle.go

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+package main
+import "fmt"
+import "math"
+func main(){
+  fmt.Println("-----Area of equilateral triangle-----")
+  var length float64
+  fmt.Print("Enter length of a side (in meters): ")
+  fmt.Scan(&length)
+
+  area := (math.Sqrt(3) / 4) * length * length
+  fmt.Printf("Area = %.2f square meters\n", area)
+}
+
+/** Output
+
+$ go run area_of_equilateral_triangle.go
+-----Area of equilateral triangle-----
+Enter length of a side (in meters): 5
+Area = 10.83 square meters
+
+*/

basic/area_of_triangle.go

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+package main
+import "fmt"
+func main(){
+  fmt.Println("----Finding area of a triangle-----")
+  var height float32
+  var breadth float32
+
+  fmt.Print("Enter height: ")
+  fmt.Scan(&height)
+  
+  fmt.Print("Enter base: ")
+  fmt.Scan(&breadth)
+
+  area := height * breadth
+  fmt.Println("Area =", area)
+}
+
+/** Output
+
+$ go run area_of_triangle.go
+----Finding area of a triangle-----
+Enter height: 5.6
+Enter base: 6.7
+Area = 37.519997
+
+*/

basic/arithmetic_operations.go

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+package main
+import "fmt"
+func main(){
+  fmt.Println("-----Arithmetic Operations-----")
+  var a = 25
+  var b = 2
+  fmt.Printf("%d + %d = %d\n", a, b, a + b)
+  fmt.Printf("%d - %d = %d\n", a, b, a - b)
+  fmt.Printf("%d * %d = %d\n", a, b, a * b)
+  fmt.Printf("%d / %d = %.2f\n", a, b, (float64(a) / float64(b)))
+}
+
+/** Output
+
+$ go run arithmetic_operations.go
+-----Arithmetic Operations-----
+25 + 2 = 27
+25 - 2 = 23
+25 * 2 = 50
+25 / 2 = 12.50
+25 % 2 = 1
+  fmt.Printf("%d %% %d = %d\n", a, b, a % b)
+}
+
+*/

basic/celsius_to_fahrenheit.go

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+package main
+import "fmt"
+func main(){
+  fmt.Println("-----Convert Celcius to Fahrenheit-----")
+  var celcius float64
+  fmt.Print("Enter temperature in celcius degrees: ") 
+  fmt.Scan(&celcius)
+  fahrenheit  := (celcius * (9/5)) + 32
+  fmt.Println("Temperature in Fahrenheit degrees= ", fahrenheit)
+}
+
+/** Output
+
+$ go run celsius_to_fahrenheit.go
+-----Convert Celcius to Fahrenheit-----
+Enter temperature in celcius degrees: 30
+Temperature in Fahrenheit degrees=  86
+
+*/

basic/circle_diameter_and_circumference.go

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+package main
+import "fmt"
+func main(){
+  fmt.Println("-----Find diameter and circumference of a circle-----")
+  const Pi = 3.14
+  var radius float64
+  
+  fmt.Print("Enter radius of circle (in meters): ")
+  fmt.Scan(&radius)
+
+  circumference := 2 * Pi * radius
+  diameter := 2 * radius
+
+  fmt.Println("Radius       :", radius)
+  fmt.Println("Circumference:", circumference)
+  fmt.Println("Diameter     :", diameter)
+}
+
+/** Output - 
+
+$ go run circle_diameter_and_circumference.go
+-----Find diameter and circumference of a circle-----
+Enter radius of circle (in meters): 5.5
+Radius       : 5.5
+Circumference: 34.54
+Diameter     : 11
+
+*/

basic/compound_interest.go

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+/**
+ CI = P * (1 + (R / 100))^T
+*/
+package main
+import (
+	"math"
+	"fmt"
+)
+func main(){
+  fmt.Println("-----Compound Interest-----")
+  var principle float64
+  var numberOFYears float64
+  var rateOfInterest float64
+
+  fmt.Print("Enter principle: ")
+  fmt.Scan(&principle)
+  fmt.Print("Enter number of years: ")
+  fmt.Scan(&numberOFYears)
+  fmt.Print("Enter rate of interest: ")
+  fmt.Scan(&rateOfInterest)
+
+  compoundInterest := principle * math.Pow((1 + rateOfInterest / 100), numberOFYears)
+
+  fmt.Printf("Compound Interest = %.2f\n", compoundInterest)
+}
+
+/** Output
+
+$ go run compound_interest.go
+-----Compound Interest-----
+Enter principle: 2000
+Enter number of years: 5
+Enter rate of interest: 10
+Compound Interest = 3221.02
+
+*/

basic/days_to_years.go

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+package main
+import "fmt"
+func main(){
+  fmt.Println("-----Convert Days to Years and Months-----")
+  var days int
+  fmt.Print("Enter number of days: ")
+  fmt.Scan(&days)
+
+  years := days / 365
+  weeks := (days % 365) / 7
+  days  = days - ((years * 365) + (weeks * 7))
+
+  fmt.Printf("Years: %d\n", years);
+  fmt.Printf("Weeks: %d\n", weeks);
+  fmt.Printf("Days : %d\n", days);
+}
+
+/** Output
+$ go run days_to_years.go
+-----Convert Days to Years and Months-----
+Enter number of days: 417
+Years: 1
+Weeks: 7
+Days : 3
+
+*/

basic/input_from_user.go

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+package main
+import "fmt"
+func main(){
+  fmt.Println("-----Input from User-----")
+  var myVal int
+  fmt.Print("Enter a number: ")
+  fmt.Scan(&myVal)
+  fmt.Printf("Thank you! You entered %d!\n", myVal)
+}
+
+/** Output
+
+$ go run input_from_user.go
+-----Input from User-----
+Enter a number: 234
+Thank you! You entered 234!
+
+*/

basic/power_of_a_number.go

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+package main
+import "fmt"
+import "math"
+func main(){
+  fmt.Println("-----Power of a number: x^y-----")
+  var base float64
+  var exponent float64
+
+  fmt.Print("Enter base: ")
+  fmt.Scan(&base)
+  fmt.Print("Enter exponent: ")
+  fmt.Scan(&exponent)
+
+  power := math.Pow(base, exponent)
+  fmt.Printf("%.0f ^ %.0f = %.0f\n", base, exponent, power)
+}
+
+/** Output
+
+$ go run power_of_a_number.go
+-----Power of a number: x^y-----
+Enter base: 2
+Enter exponent: 3
+2 ^ 3 = 8
+
+*/

basic/rectangle_area_and_perimeter.go

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+package main
+import "fmt"
+func main(){
+  fmt.Println("-----Find Reactangle Area and Perimeter-----")
+  var length float64
+  var breadth float64
+
+  fmt.Print("Enter length of rectangle (in meters): ")
+  fmt.Scan(&length)
+  fmt.Print("Enter breadth of rectangle (in meters): ")
+  fmt.Scan(&breadth)
+
+  area := length * breadth
+  perimeter := 2 * (length + breadth)
+  
+  fmt.Println("Length   :", length, "meters")
+  fmt.Println("Breadth  :", breadth, "meters")
+  fmt.Println("Area     :", area, "square meters")
+  fmt.Println("Perimeter:", perimeter, "meters")
+}
+
+/** Output
+
+$ go run rectangle_area_and_perimeter.go
+-----Find Reactangle Area and Perimeter-----
+Enter length of rectangle (in meters): 2.5
+Enter breadth of rectangle (in meters): 5.5
+Length   : 2.5 meters
+Breadth  : 5.5 meters
+Area     : 13.75 square meters
+Perimeter: 16 meters
+
+*/

basic/simple_interest.go

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+package main
+import "fmt"
+func main(){
+  fmt.Println("-----Simple Interest-----")
+  var principle float64
+  var numberOFYears float64
+  var rateOfInterest float64
+
+  fmt.Print("Enter principle: ")
+  fmt.Scan(&principle)
+  fmt.Print("Enter number of years: ")
+  fmt.Scan(&numberOFYears)
+  fmt.Print("Enter rate of interest: ")
+  fmt.Scan(&rateOfInterest)
+
+  simpleInterest := principle * numberOFYears * rateOfInterest / 100
+
+  fmt.Printf("Simple Interest = %.2f\n", simpleInterest)
+}
+
+/** Output
+
+$ go run simple_interest.go
+-----Simple Interest-----
+Enter principle: 2000
+Enter number of years: 5
+Enter rate of interest: 10
+Simple Interest = 1000.00
+
+*/

basic/student_marks.go

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+package main
+import "fmt"
+func main(){
+  fmt.Println("-----Student Marks-----")
+  var marks1 int
+  var marks2 int
+  var marks3 int
+  var marks4 int
+  var marks5 int
+  const maxMarksInASubject int = 100
+
+  fmt.Print("Enter Marks in subject 1 of 5: ")
+  fmt.Scan(&marks1)
+  fmt.Print("Enter Marks in subject 2 of 5: ")
+  fmt.Scan(&marks2)
+  fmt.Print("Enter Marks in subject 3 of 5: ")
+  fmt.Scan(&marks3)
+  fmt.Print("Enter Marks in subject 4 of 5: ")
+  fmt.Scan(&marks4)
+  fmt.Print("Enter Marks in subject 5 of 5: ")
+  fmt.Scan(&marks5)
+
+  total := marks1 + marks2 + marks3 + marks4 + marks5
+  average := float64(total) / 5
+  percentage := 100 * float64(total) / (float64(maxMarksInASubject) * 5)
+
+  fmt.Println("Total    :", total)
+  fmt.Printf("Average   : %.2f\n", average)
+  fmt.Printf("Percentage: %.2f\n", percentage)
+}
+
+/** Output
+
+$ go run student_marks.go
+-----Student Marks-----
+Enter Marks in subject 1 of 5: 95
+Enter Marks in subject 2 of 5: 97
+Enter Marks in subject 3 of 5: 98
+Enter Marks in subject 4 of 5: 96
+Enter Marks in subject 5 of 5: 93
+Total    : 479
+Average   : 95.80
+Percentage: 95.80
+
+*/

basic/sum_of_two_numbers.go

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+package main
+import "fmt"
+func main(){
+  fmt.Println("----Sum of two numbers-----")
+  var a = 10
+  var b = 20
+  var sum = a + b
+  fmt.Println("a = ", a)
+  fmt.Println("b = ", b)
+  fmt.Println(a, "+", b,  "=", sum)
+}
+
+/** Outputs
+
+$ go run sum_of_two_numbers.go
+----Sum of two numbers-----
+a =  10
+b =  20
+10 + 20 = 30
+
+*/