Looping Statements

while ( expression )
statement

In a while loop, the expression is evaluated. If nonzero, the statement executes, and the expression is evaluated again. This happens over and over until the expression's value is zero. If the expression is zero the first time it is evaluated, statement is not executed at all.

do
statement
while ( expression);

A do while loop is just like a plain while loop, except the statement executes before the expression is evaluated. Thus, the statement will always be evaluated at least once.

for ( expression1; expression2; expression3 )
statement

In a for loop, first expression1 is evaluated. Then expression2 is evaluated, and if it is zero EEL leaves the loop and begins executing instructions after statement. Otherwise the statement is executed, expression3 is evaluated, and expression2 is evaluated again, continuing until expression2 is zero.

You can omit any of the expressions. If you omit expression2, it is like expression2 is nonzero. while (expression) is the same as for (; expression; ). The syntax for (;;) creates an endless loop that must be exited using the break statement (or one of the other statements described below).

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If Statement Epsilon Extension Language Switch Statements