Java.lang.StrictMath.signum() Method

Description

The java.lang.StrictMath.signum(double d) method returns the signum function of the argument i.e zero if the argument is zero, 1.0 if the argument is greater than zero, -1.0 if the argument is less than zero.It include these cases:

• If the first argument is NaN, NaN is returned. .
• If the argument is positive zero or negative zero, then the result is the same as the argument.

Declaration

Following is the declaration for java.lang.StrictMath.signum() method

public static double signum(double d)

Parameters

• d -- This is the floating-point value whose signum is to be returned.

Return Value

This method returns signum function of the argument.

Exception

• NA

Example

The following example shows the usage of java.lang.StrictMath.signum() method.

package com.tutorialspoint;

import java.lang.*;

public class StrictMathDemo {

  public static void main(String[] args) {
  
    double d1 = 102.20d, d2 = 0.0d, d3 = -0.0d;

    // returns 1.0 if the argument is greater than zero
    double retval = StrictMath.signum(d1);
    System.out.println("Value = " + retval);

    /* if the argument is positive zero, then the result is the
    same as the argument */
    retval = StrictMath.signum(d2);
    System.out.println("Value = " + retval);
    
    /* if the argument is negative zero, then the result is the 
    same as the argument */
    retval = StrictMath.signum(d3);
    System.out.println("Value = " + retval);
  }
}

Let us compile and run the above program, this will produce the following result:

Value = 1.0
Value = 0.0
Value = -0.0