Hp 38g Graphing Calculator Manuel d'utilisateur télécharger pdf (Page 169)

Loop Commands

A programming structure allows a program to control how it

should execute depending on given conditions or the values

of particular arguments. The HP 38G has two kinds of control

structures;

® Branch structures.

• Loop structures

DO...UNTIL

...END

Do ... Until... End is a loop structure that executes the loop-

clause repeatedly until test-clause returns a true (nonzero) result.

Because the test is executed after the loop>clause, the loop-clause

is always executed at least once. Its syntax is;

DO loop-clause UNTIL test-clause END

WHILE...

REPEAT...

END

While ... Repeat... End is a loop structure that repeatedly

evaluates test<lause and executes loop<lause sequence if the test

is true. Because the test-clause is executed before the loop-

clause, the loop-clause is not executed if the test is initially false.

Its syntax is;

WHILE test-clause REPEAT loop-clause END

FOR I ...TO

...STEP

...END

FOR name=start-expression TO end-expression

STEP INCREMENT;

loop-clause END

Exeunple

FOR 1=1 to 300

STEP 30;

BEEP 800-H; .5:

END

BREAK Terminates loop.

Programming 8-17

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Hp 38g Graphing Calculator Manuel d'utilisateur Page 169