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CHAPTER 6 CONTROL STRUCTURES OF C LANGUAGE

User’s Manual U15556EJ1V0UM

116

6.5 Iteration Statements

An iteration statement executes a group of statements in the loop body as long as the value of the control

expression enclosed in parentheses is True (nonzero). C has the following three types of iteration statements.

• while

statement

• do

statement

• for

statement

The control flow of each type of iteration statement is illustrated in Figure 6-2 below.

Figure 6-2. Control Flows of Iteration Statements

while

condition

Executes

statement (s)

that follow

while.

False

True

Control flow of while loop

Loop

Control flow of do-while loop

while

condition

Executes

statement (s)

that follow

do.

Loop

True

False

Control flow of for loop

for

condition

Reevaluates

control

expression.

False

True

Loop

Executes

statement (s)

that follow

for.

Initialize

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