conditional-statements

conditional-statements/README.md

@@ -13,12 +13,12 @@
 - [Program to check whether a character is uppercase or lowercase alphabet](is_upper_case.go)
 - [Program to input week number and print week day](print_week_day.go)
 - [Program to input week number and print week day using switch](print_week_day_using_switch.go)
+- [Program to input week number and print week day using an array](print_week_day_using_array.go)
 - [Program to input month number and print month name and number of days in that month](days_of_month.go)
-
+- [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)
+- [Program to input angles of a triangle and check whether triangle is valid or not](is_valid_triangle.go)
+- [Program to check whether the triangle is equilateral, isosceles or scalene triangle](get_triangle_type.go)
 ## To be written
-- Program to input angles of a triangle and check whether triangle is valid or not
-- Program to input all sides of a triangle and check whether triangle is valid or not
-- Program to check whether the triangle is equilateral, isosceles or scalene triangle
 - Program to find all roots of a quadratic equation
 - Program to calculate profit or loss
 - Program to input marks of five subjects Physics, Chemistry, Biology, Mathematics and Computer. Calculate percentage and grade according to following:

conditional-statements/days_of_month_using_map.go

@@ -0,0 +1,44 @@
+package main
+import "fmt"
+func main(){
+	type Month struct {
+		name string
+		days int
+	}
+	monthsMap := map[int]Month{
+		1: { name: "January", days: 31 },
+		2: { name: "February", days: 28 },
+		3: { name: "March", days: 31 },
+		4: { name: "April", days: 30 },
+		5: { name: "May", days: 31 },
+		6: { name: "June", days: 30 },
+		7: { name: "July", days: 31 },
+		8: { name: "August", days: 31 },
+		9: { name: "September", days: 30 },
+		10: { name: "October", days: 31 },
+		11: { name: "November", days: 30 },
+		12: { name: "December", days: 31 },
+	}
+
+	var n int
+	fmt.Print("Enter month number(1 - 12): ")
+	fmt.Scan(&n)
+
+	if monthsMap[n].name != "" {
+		fmt.Printf("%s - %d days\n", monthsMap[n].name, monthsMap[n].days)
+	} else {
+		fmt.Println("Please enter a valid value between 1 and 12")
+	}
+}
+
+/** Outputs
+
+$ go run days_of_month_using_map.go
+Enter month number(1 - 12): 6
+June - 30 days
+
+$ go run days_of_month_using_map.go
+Enter month number(1 - 12): 66
+Please enter a valid value between 1 and 12
+
+*/

conditional-statements/get_triangle_type.go

@@ -0,0 +1,46 @@
+package main
+import "fmt"
+func getTriangleType(side1, side2, side3 float64)string{
+	if(side1 == side2 && side2 == side3){
+		return "EQUILATERAL triangle"
+	}
+
+	if(side1 == side2 || side2 == side3 || side3 == side1){
+		return "ISOSCELES triangle"
+	}
+
+	return "SCALENE triangle" // this is the remaining case after the aboce two cases
+}
+func main(){
+	var side1, side2, side3 float64
+	fmt.Print("Enter first side: ")
+	fmt.Scan(&side1)
+	fmt.Print("Enter second second: ")
+	fmt.Scan(&side2)
+	fmt.Print("Enter third third: ")
+	fmt.Scan(&side3)
+
+	fmt.Println(getTriangleType(side1, side2, side3))
+}
+
+/** Output
+
+$ go run get_triangle_type.go
+Enter first side: 10
+Enter second second: 10
+Enter third third: 10
+EQUILATERAL triangle
+
+$ go run get_triangle_type.go
+Enter first side: 10
+Enter second second: 10
+Enter third third: 20
+ISOSCELES triangle
+
+$ go run get_triangle_type.go
+Enter first side: 10
+Enter second second: 20
+Enter third third: 30
+SCALENE triangle
+
+*/

conditional-statements/is_valid_triangle.go

@@ -0,0 +1,36 @@
+package main
+import "fmt"
+func isValidTriangle(angle1, angle2, angle3 float64)bool{
+	return ((angle1 + angle2 + angle3) == 180) 
+}
+func main(){
+	var angle1, angle2, angle3 float64
+	fmt.Print("Enter first angle: ")
+	fmt.Scan(&angle1)
+	fmt.Print("Enter second angle: ")
+	fmt.Scan(&angle2)
+	fmt.Print("Enter third angle: ")
+	fmt.Scan(&angle3)
+
+	if(isValidTriangle(angle1, angle2, angle3)){
+		fmt.Println("The give angles CAN form a triangle")
+	} else {
+		fmt.Println("The give angles CAN_NOT form a triangle")
+	}
+}
+
+/** Output
+
+$ go run is_valid_triangle.go
+Enter first angle: 30
+Enter second angle: 60
+Enter third angle: 90
+The give angles CAN form a triangle
+
+$ go run is_valid_triangle.go
+Enter first angle: 90
+Enter second angle: 90
+Enter third angle: 90
+The give angles CAN_NOT form a triangle
+
+*/

conditional-statements/print_week_day_using_array.go

@@ -0,0 +1,33 @@
+package main
+import "fmt"
+func main(){
+	var n int
+	fmt.Print("Enter week number(1 - 7): ")
+	fmt.Scan(&n)
+	/* Note: There is a dedicated chapter to demonstrate arrays.
+	 * This purpose of this program is to show the easy method to 'print_week_day_using_switch.go'
+	 */
+	weekDays := [7]string{"Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday", "Sunday"}
+ 
+	if(n >= 1 && n <= 7){
+		fmt.Println(weekDays[n - 1]) // Array index starts from 0.
+	} else{
+		fmt.Println("Please enter a valid value between 1 and 7")
+	}
+}
+
+/** Outputs
+
+$ go run print_week_day.go
+Enter week number(1 - 7): 4
+Thursday
+
+$ go run print_week_day.go
+Enter week number(1 - 7): 7
+Sunday
+
+$ go run print_week_day.go
+Enter week number(1 - 7): 8
+Please enter a valid value: 1 - 7
+
+*/