isNumber

Typefunction
DictionaryLCS
LibraryLiveCode Script
Syntax
the isNumber of <value>
isNumber(<value>)
Summary

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

Introduced1.0
OSmac, windows, linux, ios, android
Platformsdesktop, server, mobile
Parameters
NameTypeDescription
value

Any source of value.

Example
isNumber(8) -- returns true
isNumber(1+5) -- returns true
isNumber(foo) -- returns false
Values
NameTypeDescription
return

The isNumber function returns true or false.

RelatedOperator: is a
Function: value, exists
Glossary: operation, operator, validate, return, error
Control Structure: function
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.

Tagsmath