Determine if a string is numeric: Difference between revisions
→Insitux: implementation
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if isnumeric('picklejuice') then print, 'yes' else print, 'no'
; ==> no</syntaxhighlight>
=={{header|Insitux}}==
Non-null and non-false values are truthy in Insitux. The operation <b>to-num</b> returns null if it is unable to parse its string parameter, else the parsed number. The operation <b>bool</b> is unnecessary in most situations, but is composed with <b>to-num</b> here to satisfy the task specification.
<syntaxhighlight lang="insitux">> (var numeric? (comp to-num bool))
(comp to-num bool)
> (numeric? "123")
true
> (numeric? "0x25")
true
> (numeric? "0b0101")
true
> (numeric? "hello")
false
> (numeric? "123x456")
false</syntaxhighlight>
=={{header|J}}==
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