Documentation

isnumber

Syntax: %isnumber(s)

true if s represents a valid number.

Example:

#VAR a {}
#VAR b {-0}
#VAR c {3+5}
#MATH d {3+5}
#SHOW a:%isnumber(@a) b:%isnumber(@b) c:%isnumber(@c) d:%isnumber(@d)

displays:

a:0 b:1 c:0 d:1

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