Conditional Loops

Conditional loops, Repeat and While, repeat a sequence of statements, evaluating a conditional expression each time through the loop. The loop terminates when the condition evaluates to True. You can exit from a conditional loop using a Break statement. If the Break statement is in a loop embedded in another loop, the break applies only to the inside loop.

Repeat Statement

The syntax of the Repeat statement is:

Repeat
   statement_list;
Until logical_expression;

The Repeat statement executes the statements in statement_list once, and then evaluates logical_expression. If logical_expression is False, the sequence of statements is repeated until logical_expression is True.

While Statement

The syntax of the While statement is:

While logical_expression
   statement_list;
End-While;

The While statement evaluates logical_expression before executing the statements in statement_list. It continues to repeat the sequence of statements until logical_expression evaluates to False.