LOOPING

A loop is a set of one or more instructions. These instructions can be repeated as many times as you want. You can create a loop with a GOTO statement.

A program like the following will run continually:

10INPUT “GIVE ME A NUMBER”;N

20PRINT “YOUR NUMBER IS”;N

30GOTO 10

RUN

You can modify the program to get out of a loop by using an IF statement to control the loop like the program that calculates the area of a rectangle.

Another way to create a loop is through the use of the FOR and NEXT statements. These statements surround the instructions that you want to repeat.

For example, type the following:

NEW

 

10

FOR N=1 TO 10

press ENTER

20

PRINT “HELLO”

press ENTER

30

NEXT N

press ENTER

RUN

 

 

 

 

 

The word “HELLO” appears 10 times on the screen. You can change line 20 to print the value of N every time the loop repeats.

Type:

20 PRINT “N IS”;N

press ENTER

 

 

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