# Absolute Value
> Compute an [absolute value][absolute-value] of a complex number.
The [absolute value][absolute-value] of a complex number is defined as
which corresponds to the length of a vector from the origin to a complex value plotted in the complex plane.
## Usage
```javascript
var cabs = require( '@stdlib/math/base/special/cabs' );
```
#### cabs( re, im )
Computes an [absolute value][absolute-value] of a `complex` number comprised of a **real** component `re` and an **imaginary** component `im`.
```javascript
var y = cabs( 5.0, 3.0 );
// returns ~5.83
```
## Examples
```javascript
var Complex128 = require( '@stdlib/complex/float64' );
var randu = require( '@stdlib/random/base/randu' );
var round = require( '@stdlib/math/base/special/round' );
var real = require( '@stdlib/complex/real' );
var imag = require( '@stdlib/complex/imag' );
var cabs = require( '@stdlib/math/base/special/cabs' );
var re;
var im;
var z;
var i;
for ( i = 0; i < 100; i++ ) {
re = round( randu()*100.0 ) - 50.0;
im = round( randu()*100.0 ) - 50.0;
z = new Complex128( re, im );
console.log( 'cabs(%s) = %d', z.toString(), cabs( real(z), imag(z) ) );
}
```
[absolute-value]: https://en.wikipedia.org/wiki/Absolute_value
