Name: isNumber

Type: function

Syntax: the isNumber of <value> 

Syntax: isNumber(<value>)

Summary: <return|Returns> true if a <value> is a number, false if it is not.

Introduced: 1.0

OS: mac,windows,linux,ios,android

Platforms: desktop,server,web,mobile

Example:
isNumber(8) -- returns true

Example:
isNumber(1+5) -- returns true

Example:
isNumber(foo) -- returns false

Parameters:
value: Any source of value.

Returns (bool): The <isNumber> <function> <return|returns> true or false.

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.

References: is a (operator), value (function), exists (function), operation (glossary), operator (glossary), validate (glossary), return (glossary), error (glossary), function (control_st)

Tags: math
