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Golang Program to Create a Class and Compute the Area and Perimeter of a Circle
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
Updated on: 30-Jul-2021
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