Feedback on: irt.org FAQ Knowledge Base Q39

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Feedback on:
irt.org FAQ Knowledge Base Q39

Sent by
Marcos on December 13, 2002 at 12:57:50:

Worth:
Worth reading

Length:
Just right

Technical:
Just right

Comments:
There is another way using regular expressions, that won't mind leading zeroes. "/\D/" will check for anything that's not a digit (0-9) in the string:

var string = "123a4";
regexp = /\D/;
if (regexp.test(string))
alert(string + " is not a natural number.");