Exists | EXISTS

Syntax

EXISTS( [input] )

Parameters

input
Any data may be used as the input.

Return Value

FALSE if the INPUT is UNDEFINED or not set, otherwise TRUE.

Description

Determine if a value is defined.

Examples

EXISTS(UNDEFINED) # returns FALSE

EXISTS(NULL) # returns TRUE

# ${somevar} is not set
EXISTS(${somevar}) # returns FALSE

EXISTS(0) # returns TRUE

EXISTS("") # returns TRUE