clex: Command-Line-Expression-evaluator

• SYNOPSIS
  
     clex <expression>
  
• DESCRIPTION
  A calculator which receives a boolean or arithmetic expression as an argument, evaluates it and prints the result on standard output. If a valid arithmetic expression is given, the numeric result is printed on stdout and the program exits with 0. If a boolean expression is given, clex is mute and conveys the result of the evaluation to the caller via the return value: 0/1: expression evaluates to true/false.
• REFERENCE
  See evselect documentation for the full list of available arithmetic/boolean operators and functions.