Given a radius of the circle, write a java program to calculate and display the area of the circle. (Take ∏=3.142)
Example
Input : radius= 5 Output: Area of circle is : 78.55 Input : radius= 8 Output: Area of circle is : 201.08
As we know to calculate the area of a circle, the radius of the circle must be known, so if the radius of the circle is known, then the area of the circle can be calculated by using the formula:
Area = 3.142*(radius)*(radius)
Below is the Java Program to calculate the area of the circle:-
Java
// Java program to calculate the area of thepublic class GFG { public static void main(String[] args) { int radius; double pi = 3.142, area; radius = 5; // calculating the area of the circle area = pi * radius * radius; // printing the area of the circle System.out.println("Area of circle is :" + area); }} |
Output
Area of circle is :78.55
Time complexity: O(1) since performing constant operations
Auxiliary Space: O(1)
