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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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