Kotlin Program to Find the Area of a Circle

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() {
   val radius = 5
   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() {
   val radius = 5
   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")
}

Output

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