Java - Long signum() method

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Description

The Java Long signum() method returns the signum function of the specified long value.

Declaration

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

public static int signum(long i)

Parameters

i − This is the long value.

Return Value

This method returns the signum function of the specified long value.It is -1 if the specified value is negative, 0 if the specified value is zero and 1 if the specified value is positive.

Exception

NA

Example 1

The following example shows the usage of Long signum() method to get the signum function of the specified long value. We've created a long variable and assigned it a positive long value. Then using signum() method, we're printing the result.

package com.tutorialspoint;
public class LongDemo {
   public static void main(String[] args) {
      long i = 170L;
      System.out.println("Number = " + i);
    
      /* returns the signum function of the given number */
      System.out.println("signum = " + Long.signum(i));
   }
}

Output

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

Number = 170
signum = 1

Example 2

The following example shows the usage of Long signum() method to get the signum function of the specified long value. We've created a long variable and assigned it a negative long value. Then using signum() method, we're printing the result.

package com.tutorialspoint;
public class LongDemo {
   public static void main(String[] args) {
      long i = -170L;
      System.out.println("Number = " + i);
    
      /* returns the signum function of the given number */
      System.out.println("signum = " + Long.signum(i));
   }
}

Output

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

Number = -170
signum = -1

Example 3

The following example shows the usage of Long signum() method to get the signum function of the specified long value. We've created a long variable and assigned it a zero value. Then using signum() method, we're printing the result.

package com.tutorialspoint;
public class LongDemo {
   public static void main(String[] args) {
      long i = 0L;
      System.out.println("Number = " + i);
    
      /* returns the signum function of the given number */
      System.out.println("signum = " + Long.signum(i));
   }
}

Output

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

Number = 0
signum = 0