Java Program to Print Square Pattern with Stars

This is a very basic program for beginners who starts learning for loop. This is the best example to understand how the nested loops works. In our program we are going to print the below square star (* ) pattern as shown in the image.

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Java Program to Calculate Area of a Circle

The Mathematical formula to find Area of a Circle is : A= πr2 or we can write it as given below.
area = pi * radius * radius

So, to find Area of a circle we need the values of 'pi' and radius. In java we have predefined Mathematical value for pi is defined in java.lang.Math.PI = 3.141592653589793. PI is a static final value.

In our program we need to read radius value from the console by using BufferedReader or Console classes.

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