The **`abs` method** takes one argument and returns the #key# absolute value: the non-negative value #key# of the passed argument. The arguments can be `int`, `long`, `float`, or `double`. 

`abs` is a `static` method present in the `Math` class. 


# Syntax 

```java
Math.abs(a);
``` 

# Arguments

* `a`: The argument from which the absolute value will be returned.

# Return value

If the value of the passed argument is: 

*  `Negative`, then the negative sign is removed and a
*positive value* is returned.

* `Postive`, then the *value of the argument* is returned.

* `NaN`, then `NaN` will be returned.

* an `Infinite` value, then `Infinity` will be returned. 


# Example 

import java.lang.Math;
class AbsTest {
    public static void main(String cmdArgs[]) {
        int a = -20;
        System.out.print("The absolute value of "+ a + " is ");
        System.out.println(Math.abs(a));

        double negativeInfinity = Double.NEGATIVE_INFINITY;
        System.out.print("The absolute value of "+ negativeInfinity + " is ");
        System.out.println(Math.abs(negativeInfinity));

        int twelve = 12;
        System.out.print("The absolute value of 12 is ");
        System.out.println(Math.abs(twelve));

    }
}

In the code above, we use the `Math.abs` function to find the absolute value of the numbers. The `Math.abs` will return: 

- `20` for the `-20` argument.
- `Infinity` for the `-Infinity` argument.
- `12` for the `12` argument.

What is the Math.abs function in Java?

The `Math.abs` method returns the absolute value of the passed argument, handling int, long, float, or double types.