How to find the absolute value in Java?

The absolute value of a real number is its positive value irrespective of its sign. In mathematics, absolute value of x is denoted by |x|. For instance, if we’ve -10 the absolute value will be 10. In java, abs() is used to transform a real number into its absolute value. 

Syntax

Here, we have general syntax for abs() function.

public static dataType abs(dataType value)

Java programming language supports the following variants:

• static double abs(double a)
• static float abs(float a)
• static int abs(int a)
• static long abs(long a)

Parameters

It takes a number whose absolute value will be evaluated. It can be int, float, double, or long.

Return value

It returns the absolute value of the argument number. It can be int, float, double, or long.

Explanation

In this coding example, we’re going to elaborate on how abs() function behave upon different argument types.

class AlgoIdeas {
  public static void main( String args[] ) {

    /* Converting integer values into absolute values */
    int x1 = 456;
    int y1 = -845;
    System.out.printf( "Absolute Value of x1: %d \n", Math.abs(x1) );
    System.out.printf( "Absolute Value of y1: %d \n", Math.abs(y1) );

    /* Converting double values into absolute values */
    double x3 = 456;
    double y3 = -279;
    System.out.printf( "Absolute Value of x3: %f \n", Math.abs(x3) );
    System.out.printf( "Absolute Value of y3: %f \n", Math.abs(y3) );

/* Converting float values into absolute values */
    float x2 = 12.3f;
    float y2 = -13.4f;
    System.out.printf( "Absolute Value of x2: %f \n", Math.abs(x2) );
    System.out.printf( "Absolute Value of y2: %f \n", Math.abs(y2) );
    
    /* Converting long type values into absolute values */
    long x4 = 345L;
    long y4 = -567L;
    System.out.printf( "Absolute Value of x4: %d \n", Math.abs(x4) );
    System.out.printf( "Absolute Value of y4: %d \n", Math.abs(y4) );
  }
}

• Line#4-8: Defining two integer values x1, and y1. Then invoking Math.abs() method to calculate the absolute value. It will return an absolute value of the same type as argument values.
• Line#10-14: Defining two double values x2, and y2. Then invoking Math.abs() method to calculate the absolute value. It will return an absolute value of the same type as argument values.
• Line#16-20: Defining two floating point values x3, and y3. Then invoking Math.abs() method to calculate the absolute value. It will return an absolute value of the same type as argument values.
• Line#22-26: Defining two long values x4, and y4. Then invoking Math.abs() method to calculate the absolute value. It will return an absolute value of the same type as argument values.

Output