# Kotlin Program to Find the Area of a Circle

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In this article, we will understand how find the area of a circle. Area of a circle is calculated by using the formula −

(pie*radius*radius)/7


Below is a demonstration of the same

Suppose our input is

Radius of the circle: 5


The desired output would be −

The Area of Circle is: 78.57142857142857


## Algorithm

• Step 1 − START

• Step 2 − Declare two variables radius and myResult

• Step 3 − Read the value of the radius from the user

• Step 4 − Calculate the area of the circle by using the formula (22*radius*radius)/7 and store the result as area

• Step 5 − Display the area value

• Step 6 − STOP

## Example 1

In this example, we will find the area of a circle using the above given formulae. First. declare and set the radius

val radius = 5


Now, calculate the area of the circle and save the result in a new variable myResult

val myResult = (22 * (radius.toDouble().pow(2)))/7


Let us now see the example to get the area of a circle −

import java.util.*
import kotlin.math.pow

fun main() {
println("The radius of the circle is defined as $radius") val myResult = (22 * (radius.toDouble().pow(2)))/7 println("Area of circle is:$myResult")
}


## Output

The radius of the circle is defined as 5
Area of circle is: 78.57142857142857


## Example 2

In this example, we will find the area of a circle −

import java.util.*
import kotlin.math.pow
fun main() {
println("The radius of the circle is defined as $radius") getArea(radius) } fun getArea(radius: Int) { val myResult = (22 * (radius.toDouble().pow(2)))/7 println("Area of circle is:$myResult")

The radius of the circle is defined as 5