======Syntax:======
abs(//number//)

======Technical:======
The abs() function returns the absolute value of //number// using fabs(3).
All of the normal [[rules about number arguments]] apply.

======Examples:======
  * abs(-3)                returns "3"
  * abs(5)                 returns "5"
  * abs(0)                 returns "0"

======History:======
The abs() function first appeared in EPIC4-1.1.2