KEYWORD_SET
Syntax | Return Value | Arguments | Keywords | Examples | Version History | See Also
The KEYWORD_SET function returns a Boolean value based on the value of the specified expression. It returns a True (1) if its argument is defined and nonzero, and False (0) otherwise. The exact rules used to determine this are given in Return Value below.
Syntax
Result = KEYWORD_SET(Expression)
Return Value
This function returns True (1) if:
KEYWORD_SET returns False (0) if:
Arguments
Expression
The expression to be tested. Expression is usually a named variable.
Keywords
None.
Examples
Suppose that you are writing an IDL procedure that has the following procedure definition line:
The following command could be used to execute a set of commands only if the keyword KEYW1 is set (i.e., it is present and nonzero):
The commands to be executed only if KEYW1 is set would follow.
Version History
See Also
ARG_PRESENT, LOGICAL_TRUE, N_ELEMENTS, N_PARAMS
