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Variable.Exists

Checks if a variable with that name exists.

Component Version macOS Windows Linux Server iOS SDK
Variable 4.0 ✅ Yes ✅ Yes ✅ Yes ✅ Yes ✅ Yes
MBS( "Variable.Exists"; Name )   More

(old name: FM.VariableExists)

Parameters

Parameter Description Example
Name The name of the variable. "x"

Result

Returns 1 if variable exists, else 0.

Description

Checks if a variable with that name exists.

Examples

Check function:

Let ( [
c1 = MBS( "Variable.Exists"; "testing" );
c2 = MBS( "Variable.Set"; "testing"; "Hello" );
c3 = MBS( "Variable.Exists"; "testing" )
]; c1 & c3 )

Example result: 01

See also

Example Databases

Blog Entries

This function checks for a license.

Created 18th August 2014, last changed 15th April 2025


Variable.ClearAll - Variable.Get