#### NAME

abs - absolute value function

v = abs(NumExpr)

#### DESCRIPTION

Abs returns the absolute value of its argument.  The argument must be a numeric expression.

#### EXAMPLE

The program
```	pi = 3.14159265
for n = -90 to 90 step 10
value = sin(n * pi / 180)
absvalue = abs(value)
print "The absolute value of "; value;_
" is "; absvalue
next
```
produces
```	The absolute value of -1  is  1
The absolute value of -.9848077  is  .9848077
The absolute value of -.9396926  is  .9396926
The absolute value of -.8660254  is  .8660254
The absolute value of -.7660444  is  .7660444
The absolute value of -.6427876  is  .6427876
The absolute value of -.5  is  .5
The absolute value of -.3420201  is  .3420201
The absolute value of -.1736482  is  .1736482
The absolute value of  0  is  0
The absolute value of  .1736482  is  .1736482
The absolute value of  .3420201  is  .3420201
The absolute value of  .5  is  .5
The absolute value of  .6427876  is  .6427876
The absolute value of  .7660444  is  .7660444
The absolute value of  .8660254  is  .8660254
The absolute value of  .9396926  is  .9396926
The absolute value of  .9848077  is  .9848077
The absolute value of  1  is  1
```