Java Program to Calculate and Display Area of a Circle
Last Updated :
28 Jul, 2022
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
public class GFG {
public static void main(String[] args)
{
int radius;
double pi = 3.142 , area;
radius = 5 ;
area = pi * radius * radius;
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)
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