Example 5: Propagate errors to caller with RAISE

This example shows the usage of WHENEVER ... RAISE to propagate a potential exception to the caller. The division by zero error will occur in the divide() function, but appear as if the division operator was used directly at the line calling this function:

MAIN
    TRY
        DISPLAY "Next function call will generate an exception"
        DISPLAY divide(100, 0)
    CATCH
        DISPLAY "Error: ", status
    END TRY
END MAIN

FUNCTION divide(a FLOAT, b FLOAT) RETURNS FLOAT
    WHENEVER ANY ERROR RAISE
    RETURN a / b
END FUNCTION

Program output:

Next function call will generate an exception 
Error:    -1202