Dinfio Documentation — Function Reference: var_exists()

Module core → var_exists()

Description

Check whether a variable is declared or not

var_exists(var_name)

Parameters

var_name (variable) — Variable name

Return Value

boolean — Returns true if variable is declared, and returns false if otherwise

Usage Example

var a, b
c = 10
 
var_exists(a)    ' Returns true
var_exists(b)    ' Returns true
var_exists(c)    ' Returns true
var_exists(d)    ' Returns false