What is the StrictMath.signum(float) function in Java?

Overview

In Java, signum is a static function of the StrictMath class. It is used to get the signum function of the specified float value.

Note: The StrictMath class has some utility methods for performing basic numeric operations. It is present in the java.lang package. Read more about the StrictMath class here.

Syntax

public static float signum(float d)

Parameter value

This method takes a float value as an argument.

Return value

This method returns a float value:

  • 1.0: The argument is greater than zero.

  • -1.0: The argument is less than zero.

  • 0.0: The argument is equal to zero.

Note: If the argument is NaN, +0.0, or -0.0, the return value is the same as the argument.

Code

class SignumExample {
    public static void main(String[] args) {
        System.out.println("Signum for -10.10f is " + StrictMath.signum(-10.10f));
        System.out.println("Signum for 10.5f is " + StrictMath.signum(10.5f));
        System.out.println("Signum for 0.0f is " + StrictMath.signum(0.0f));
    }
}

Explanation

  • Line 3:, We call the StrictMath.signum(-10.10f) function. This returns -1.0 because the argument is less than zero.

  • Line 4: We call the StrictMath.signum(10.5f) function. This returns 1.0 because the argument is greater than zero.

  • Line 5: We call the StrictMath.signum(0.0f) function. This returns 0.0 because the argument is equal to zero.

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