Golang Program to Create a Class and Compute the Area and Perimeter of a Circle

Go Programming Server Side Programming Programming

To compute the area and perimeter of a circle, we can take following steps −

Define a struct with circle properties such as radius.
Define a method to calculate the area of the circle.
Define a method to calculate the perimeter of the circle.
In the main method, take the user's input for circle's radius.
Instantiate the circle with the radius.
Print the area of the circle.
Print the perimeter of the circle.

Example

package main
import (
   "fmt"
   "math"
)
type Circle struct {
   radius float64
}
func (r *Circle)Area() float64{
   return math.Pi * r.radius * r.radius
}
func (r *Circle)Perimeter() float64{
   return 2 * math.Pi * r.radius
}
func main(){
   var radius float64
   fmt.Printf("Enter radius of the circle: ")
   fmt.Scanf("%f", &radius)
   c := Circle{radius: radius}
   fmt.Printf("Area of the circle is: %.2f\n", c.Area())
   fmt.Printf("Perimeter of the circle is: %.2f\n", c.Perimeter())
}

Output

Enter radius of the circle: 7
Area of the circle is: 153.94
Perimeter of the circle is: 43.98

Rishikesh Kumar Rishi

Published on 30-Jul-2021 15:24:35

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