## What is the “square” of a number?

*In mathematics or algebra, you can find the “square” of a number, by multiplying the same number with itself.*For example, the square of 2 is 4, and the square of 3 is 9.

## How to square a number in Java?

There are different ways of computing the square of a number in Java, but let’s start with the simplest method. Have a look at the following example for better understanding.### Example 1

```
package com.square.java;
public class AlgebricSquare {
public static int getSquare(int number) {
return number * number;
}
public static void main(String[] args) {
int number = 2;
System.out.println("Square of " + number + " is: " + getSquare(number));
number = 5;
System.out.println("Square of " + number + " is: " + getSquare(number));
number = 7;
System.out.println("Square of " + number + " is: " + getSquare(number));
}
}
```

#### Output

Square of 2 is: 4
Square of 5 is: 25
Square of 7 is: 49

#### Explanation

In this example, we have created a simple method getSquare() taking one integer as a parameter. The method returns an integer after multiplying it with self. So we get the square of the number passed as a parameter in line 11, 14 and 17 of example 1.### Example 2

```
package com.square.java;
public class MathSquare {
public static final Integer POW = 2;
public static Double getSquare(Double number) {
return Math.pow(number, POW);
}
public static void main(String[] args) {
Double number = 3.5;
System.out.println("Square of " + number + " is: " + getSquare(number));
number = 11.1;
System.out.println("Square of " + number + " is: " + getSquare(number));
number = 13.0;
System.out.println("Square of " + number + " is: " + getSquare(number));
}
}
```

#### Output

Square of 3.5 is: 12.25
Square of 11.1 is: 123.21
Square of 13.0 is: 169.0

GO TO FULL VERSION