NUM

NUM function is used to test arguments for numeric values.

COMMAND SYNTAX

    NUM(expression)

SYNTAX ELEMENTS

expression may evaluate to any data type.

NOTES

Not exactly it checks that every character in expression is a numeric - rather if an expression can be considered as a number.

To execute user code migration from older systems correctly, the NUM function will accept both a null string and the single characters ".", "+", and "-" as being numeric.

If running jBC in ros emulation the "." , "+" and "-" characters would not be considered numeric.

EXAMPLES (prime emulation)

       CRT NUM('')                     ;* 1
       CRT NUM('123334440.12')         ;* 1
       CRT NUM('1233344.40.12')        ;* 0
       CRT NUM('1,233,344.40')         ;* 0 - thousand delimiters don't do
       CRT NUM('1 233 344.40')         ;* 0 - neither do spaces
       CRT NUM('00012')                ;* 1 - leading zeroes are ok
       CRT NUM('-123334440.12')        ;* 1 - minus is ok...
       CRT NUM('123334440.12-')        ;* 0 - ...but not everywhere
       CRT NUM('+123334440.12')        ;* 1
       CRT NUM('6.02e23')              ;* 0 - E notation doesn't work
       CRT NUM('1233Q34440.12')        ;* 0 - of course it's not
       CRT NUM('2+2')                  ;* 0 - expression isn't evaluated
       CRT NUM('.00')                  ;* 1