Page 93 - Computer Class 08

You will get following output.

1. Write any first number in this box. 1

2. Write any second number in this 2
box.

3. Click on OK button. 3

The result of the program will be
displayed here.

Looping

A loop is a series of one or more statements that execute more than one time. The loop
statement repeats until a certain predetermined condition is met. There are two types of
Looping statements, DO WHILE & FOR NEXT. The Do-While is used when you do not know
how many times to repeat the execution of the statements. Whereas in FOR-NEXT, when you
repeat the number of times the statement is to be executed.
First, we will discuss the DO-LOOP. This comes in several formats.

1. DO WHILE condition

Block of one or more Visual Basic statements
LOOP

2. DO
Block of one or more Visual Basic statements

LOOP WHILE condition
3. Do until condition

Block of one or more Visual Basic statements
LOOP

4. DO
Block of one or more Visual Basic statements

LOOP Until condition
The condition in each Do loop is any expression that evaluates to true or false. If the
condition is true, then the block of statements are executed, when it is false, the execution of

DO-LOOP terminates.
If the conditional test appears at the top and it fails, then the DO-LOOP may never execute
for once also. If the condition is given at the end of the body, then atleast the DO-LOOP will
be executed once.

Computer-8 93