is_key¶
Syntax¶
Parameters¶
table_name- The name of a table or list_table variable in the model.
key- The key to check.
Returns¶
Returns 1 (true) if the key provided exists in the table, and 0 (false) otherwise.
Description¶
Checks if a key has been assigned a value in a table or list_table variable.
Examples¶
The following checks if a key with value 200 exists in a table called T, and
if it does, prints the value: