The absolute value of a real or complex number is its distance to zero.
This absolute value or simply modulus is always a nonnegative real number.

## Absolute value of a real number

Simply put, you obtain the absolute value of a real number by omitting the sign.
If real numbers are displayed on a number line,
the negative numbers are to the left of the zero point and the positive numbers to the right of the zero point.

The absolute value of a real number is the distance from the zero point on the number line.
The absolute value of a real number \(x\) is written as \(|x|\), or as a function \(abs(x)\).

The absolute value of \(3\) is equal to \(3\) \(|3| = 3\)

The absolute value of \(-3\) is equal to \(3\) \(|-3| = 3\)

The absolute value of \(0\) is equal to \(0\) \(|0|=0\)

## Absolute value of a complex number

The representation of vectors of a complex number always results in a
right-angled triangle consisting of the two catheters \(a\) and \(b\) and the hypotenuse \(z\).
The absolute value of a complex number corresponds to the length of the vector.

The value of a complex number \(z = a + bi\) is \(|z|=\sqrt{a^2+b^2}\)

The figure below shows the graphical representation of the complex number \(3 + 4i\) an the absolute value \(|z| = 5\).

## Absolute value in RedCrab Calculator

In the RedCrab Calculator, the * Abs * function returns the absolute value of a real or complex number.

### Examples

Abs(-3)=3

Abs(3+4i)=5