isNumber

Type

function

Summary

Returns true if a value is a number, false if it is not.

Syntax

the isNumber of <value>

isNumber(<value>)

Description

Use the isNumber function to determine whether a value is a number. For example, attempting to do an arithmetic operation on a value that's not a number causes an error. You can check the value beforehand to prevent this.

This function exists for compatibility with imported SuperCard projects. You can use the is a operator to validate numbers, as well as other data types.

Parameters

Name	Type	Description
value		Any source of value.

Examples

isNumber(8) -- returns true

isNumber(1+5) -- returns true

isNumber(foo) -- returns false

Related

control structure: function

function: value, exists

glossary: operation, operator, validate, return, error

operator: is a

Compatibility and Support

Introduced

LiveCode 1.0

OS

mac

windows

linux

ios

android

Platforms

desktop

server

mobile