-- card: 54305 from stack: in.07 Reference
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-- part name: Expressions
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-- part contents for background part 2
----- text -----
Conditional expression

-- part contents for background part 1
----- text -----

A conditional expression is often convenient to use instead of an if-statement. Compare the following statement sequences;

  
                                             can be written as


The else-branch of a conditional expression may not be omitted. The types of the expressions in the then-branch and the else-branch must be compatible.

If a conditional expression is part of another expression, it must be enclosed in parentheses:

    a := 1 + (if x=y then 1 else 2);

-- part contents for card part 2
----- text -----
if x=y then                            
      a := 1 
   else
      a := 2

-- part contents for card part 1
----- text -----
a := if x=y then 1 else 2;