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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
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