HaxeDoc2

5 trace(f);
6 f = Math.random();
7 }
8 }
9 }

This kind of while-loop is not guaranteed to evaluate the loop body expression at all: If the

condition does not hold from the start, it is never evaluated. This is different for do-while loops

(5.15).

5.15 do-while

A do-while loop starts with thedokeyword followed by the loop body expression. After that

follows thewhilekeyword, an opening parenthesis(, the condition expression and a closing

parenthesis):

1 do expression while(condition);

The condition expression has to be of typeBool.

As the syntax suggests, the loop body expression is always evaluated at least once, unlike

while (5.14) loops.

5.16 if................................................

Conditional expressions come in the form of a leadingifkeyword, a condition expression en-

closed in parentheses()and a expression to be evaluated in case the condition holds:

1 if (condition) expression;

The condition expression has to be of typeBool.

Optionally,expressionmay be followed by theelsekeyword as well as another expres-

sion to be evaluated if the condition does not hold:

1 if (condition) expression1 else expression2;

Here,expression2may consist of anotherifexpression:

1 if (condition1) expression1
2 else if(condition2) expression2
3 else expression3

If the value of anifexpression is required, e.g. forvar x = if(condition) expression1

else expression2, the typer ensures that the types ofexpression1andexpression2

unify (3.5). If noelseexpression is given, the type is inferred to beVoid.

5.17 switch.............................................

A basic switch expression starts with theswitchkeyword and the switch subject expression, as

well as the case expressions between curly braces{}. Case expressions either start with thecase

keyword and are followed by a pattern expression, or consist of thedefaultkeyword. In both

cases a colon:and an optional case body expression follows: