Denso RC5 Specifikace stáhnout pdf (Strana 259)

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Chapter 11 Flow Control Statements

11-9

11.3 Repeat

DO-LOOP (Statement)

Function

Executes a decision iteration (repetition).

Format

DO [{WHILE|UNTIL}[<Conditional expression>]]

LOOP

LOOP [{WHILE|UNTIL}[<Conditional expression>]]

Explanation

DO WHILE and DO UNTIL are head decision iterations.

LOOP WHILE and LOOP UNTIL are tail decision iterations.

A WHILE statement repeats while a conditional expression is

satisfied (true (except for 0)) and an UNTIL statement repeats until

a conditional expression is satisfied.

If the right side of <Conditional expression> is ignored, the system

determines whether the value is true (except for 0).

If <Conditional expression> is ignored the conditional expression is

regarded as true (except for 0) and the loop becomes infinite in a

WHILE statement.

In the UNTIL statement, a head decision is not processed and a tail

decision executes the loop once.

There is also a WHILE-WEND statement which serves the same function

as DO WHILE-LOOP, however, only DO WHILE-LOOP should be used.

There is also a REPEAT-UNTIL statement which serves the same

function as DO-LOOP UNTIL, however, only DO-LOOP UNTIL should be

used.

WHILE and UNTIL can be ignored but they mean an infinite loop.

Related Terms

EXIT DO, WHILE-WEND, REPEAT-UNTIL, FOR-NEXT

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Denso RC5 Specifikace Strana 259

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