If

If determines whether or not some condition is true and then returns one of two values accordingly.
It has four variables: condition, thenValue, elseValue and result.
The condition variable has the value true or false.

Structure:

       if condition is true then result becomes thenValue otherwise result becomes elseValue

Example:

       if false then 'a' else 'b' = 'b'

       if true then 1 else 2 = 1

       if true then (1, 1) else (2, 2) = (1, 1)

Related topics:

Basic compound model elements

Special compound model elements

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