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Statements can be executed repeatedly with the FOR statement.

Syntax

FOR <control_variable> := <expression1> TO <expression2> BY <expression3> DO
    <statement_list>
END_FOR;

A FOR statement is executed as shown below:

•Control variable <control_variable> is assigned value <expression1>.

•If the <expression3> increment is positive, the FOR statement will be exited when control variable <control_variable> is greater than <expression2>. If the <expression3> increment is negative, the FOR statement will be exited when control variable <control_variable> is less than <expression2>.

•The statements in <statement_list> are executed.

•The value of increment <expression3> is added to control variable <control_variable>.

•Go to step 2.

The value of control variable <control_variable> is checked before the statements in <statement_list> are executed, meaning that it is possible that the statements are never executed.

Whenever the statements in <statement_list> are executed, control variable <control_variable> is increased by increment <expression3>. If the increment is positive, the control variable is increased in each cycle; if the increment is negative, the control variable is decreased in each cycle.

The step does not need to be specified. If it is not present, a step value of 1 is used.

Example

Var2 := 1;
FOR Var1 := 1 TO 5 BY 1 DO
    Var2 := Var2 * 2;
END_FOR;

After execution of the FOR loop, "Var2" has the value 32.