Java Math sqrt() example

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In this guide, you will learn about the Math sqrt() method in Java programming and how to use it with an example.

1. Math sqrt() Method Overview

Definition:

The sqrt() method of Java's Math class is used to calculate the square root of a given number.

Syntax:

Math.sqrt(double a)

Parameters:

- a: The value whose square root needs to be computed.

Key Points:

- If the argument a is NaN or less than zero, then the result will be NaN.

- If the argument a is positive infinity, then the result will be positive infinity.

- If argument a is zero, then the result will be zero.

- It returns the positive square root of a double value.

2. Math sqrt() Method Example

public class SqrtExample {
    public static void main(String[] args) {
        System.out.println("Square root of 16: " + Math.sqrt(16));
        System.out.println("Square root of 0: " + Math.sqrt(0));
        System.out.println("Square root of 7: " + Math.sqrt(7));
        System.out.println("Square root of 2.25: " + Math.sqrt(2.25));
        System.out.println("Square root of -9 (will result in NaN): " + Math.sqrt(-9));
    }
}

Output:

Square root of 16: 4.0
Square root of 0: 0.0
Square root of 7: 2.6457513110645907
Square root of 2.25: 1.5
Square root of -9 (will result in NaN): NaN

Explanation:

In the example:

1. The square root of 16 is 4.

2. The square root of 0 is 0.

3. The square root of 7 is approximately 2.6457513110645907.

4. The square root of 2.25 is 1.5.

5. Since we can't compute the square root of a negative number using this method, it results in NaN (Not a Number).

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