4rpl:commands:exists
⇐ Index
Variable Exists
Syntax
-?VARNAME
Description
Checks to see if a variable with name VARNAME exists (has been assigned). If so, 1 (true) is pushed to the stack else 0 (false).
Examples
if (-?TheAnswer) # checks if the variable exists "We have the answer" Trace else "We do not have the answer" Trace endif
4rpl/commands/exists.txt · Last modified: 2025/02/14 14:57 by 127.0.0.1
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