If statements¶

Use if to implement a conditional statement.

syntax:

(if (conditional_expression)
        code_block_1
)
Optionally...
(else
        code_block_2
)

If conditional_expression evaluates to be true (non zero), code_block_1 is executed, otherwise it is skipped. If an else is appended to the if statement and conditional expression evaluates to be false (zero), code_block_2 is executed.

Examples of using the if statement:

       (if(HaveMouse())
               DrawStatus("Mouse is available!")
       )(else
               DrawStatus("Mouse is NOT available!")
       )

       (if (SomeVar or (SomeOtherVar and not AnotherVar))
               // do something
       )


Ternary operator
===================

If statements can also be evaluated (like the ternary operator (?:) in c++).

Example::

       // Set myVar to 5 if we've opened the sewer. Otherwise set it to 10.
       (= myVar
               (if (Btest(FLAG_OpenedSewer))
                       5
               )(else
                       10
               )
       )