What is the Long.signum function in Java?
The static signum function of the Long class is used to get the signum function of the specified long value.
The signum denotes the sign of a real number.
- A real number less than zero is denoted by
-1. - A real number greater than zero is denoted by
1. - A real number equal to zero is denoted by
0.
Syntax
The following is the function prototype:
public static int signum(long i)
Argument
This method takes a long value as an argument.
Return value
This method returns:
-
1if the argument is greater than zero. -
-1if the argument is less than zero. -
0if the argument is equal to zero.
Code
The example below uses the signum function.
class LongSignumExample {public static void main(String[] args) {System.out.println("Signum for -10l is " + Long.signum(-10l));System.out.println("Signum for 10l is " + Long.signum(10l));System.out.println("Signum for 0 is " + Long.signum(0));}}
Explanation
In the code above:
-
In line 3, we called
Long.signum(-10l). This will return-1because the argument(-10l) is less than zero. -
In line 4, we called
Long.signum(10l). This will return-1because argument(10l) is greater than zero. -
In line 5, we called
Long.signum(0). This will return0because the argument is equal to zero.
TRENDING TOPICS
