isnum - luxembourg/muxcode-clm GitHub Wiki

ISNUM()

FUNCTION: isnum(<string>)

This function will return 1 (TRUE) if the argument is a valid number and 0 (FALSE) otherwise. This definition of a number includes scientific notation as well as a certain case-insensitive 'special words': NaN, -Inf, +Inf, and Ind.

You can test more restrictively with israt() or isint().

Example: > say isnum(22223.0000) You say, "1" > say isnum(10E-20) You say, "1" > say isnum(+77) You say, "1" >say isnum(+Inf) You say, "1" > say isnum(22 L) You say, "0" >say isnum(Bad Numbers!) You say, "0"

Related Topics: BOOLEAN VALUES, isdbref, isint, israt, isword