Perfect Square Program in Java2 min read

In this tutorial, we will write a java program to check if a given number is a perfect square or not. Before that, you should have knowledge of the following topic in Java.

We will look at two java perfect square programs:

  1. With sqrt() function
  2. Without sqrt() funciton

Both of the programs below take the number as user input and process it. The first program uses the math function sqrt() to check for perfect square and the second program uses if..else statement to check.

In this java program, both programs have a user-defined boolean function that returns true or false to the main function.

Using sqrt() function


Enter the number: 16
16 is a Perfect Square

Java Program to check for Perfect Square without using sqrt


Enter the number: 25
25 is a Perfect Square

Enter the number: 21
21 is NOT a Perfect Square


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