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Presentation transcript:

Topics discussed in this section: 6-5 Loops in C C has three loop statements: the while, the for, and the do…while. The first two are pretest loops, and the the third is a post-test loop. We can use all of them for event-controlled and counter-controlled loops. Topics discussed in this section: The while Loop The for Loop The do…while Loop The Comma Expression Computer Science: A Structured Programming Approach Using C

FIGURE 6-9 C Loop Constructs Computer Science: A Structured Programming Approach Using C

FIGURE 6-10 The while Statement Computer Science: A Structured Programming Approach Using C

FIGURE 6-11 Compound while Statement Computer Science: A Structured Programming Approach Using C

Process-control System Example PROGRAM 6-1 Process-control System Example Computer Science: A Structured Programming Approach Using C

A while Loop to Print Numbers PROGRAM 6-2 A while Loop to Print Numbers Computer Science: A Structured Programming Approach Using C

A while Loop to Print Numbers PROGRAM 6-2 A while Loop to Print Numbers Computer Science: A Structured Programming Approach Using C

Adding a List of Numbers PROGRAM 6-3 Adding a List of Numbers Computer Science: A Structured Programming Approach Using C

Adding a List of Numbers PROGRAM 6-3 Adding a List of Numbers Computer Science: A Structured Programming Approach Using C

more natural for counting loops. Note A for loop is used when a loop is to be executed a known number of times. We can do the same thing with a while loop, but the for loop is easier to read and more natural for counting loops. Computer Science: A Structured Programming Approach Using C

FIGURE 6-14 Comparing for and while Loops Computer Science: A Structured Programming Approach Using C

PROGRAM 6-4 Example of a for Loop Computer Science: A Structured Programming Approach Using C

PROGRAM 6-4 Example of a for Loop Computer Science: A Structured Programming Approach Using C

A Simple Nested for Loop PROGRAM 6-5 A Simple Nested for Loop Computer Science: A Structured Programming Approach Using C

A Simple Nested for Loop PROGRAM 6-5 A Simple Nested for Loop Computer Science: A Structured Programming Approach Using C

FIGURE 6-15 do…while Statement Computer Science: A Structured Programming Approach Using C

PROGRAM 6-6 Two Simple Loops Computer Science: A Structured Programming Approach Using C

PROGRAM 6-6 Two Simple Loops Computer Science: A Structured Programming Approach Using C

FIGURE 6-16 Pre- and Post-test Loops Computer Science: A Structured Programming Approach Using C

Adding a List with the do…while PROGRAM 6-7 Adding a List with the do…while Computer Science: A Structured Programming Approach Using C

Adding a List with the do…while PROGRAM 6-7 Adding a List with the do…while Computer Science: A Structured Programming Approach Using C

FIGURE 6-17 Nested Comma Expression Computer Science: A Structured Programming Approach Using C

Comparison of while and do…while PROGRAM 6-8 Comparison of while and do…while Computer Science: A Structured Programming Approach Using C

Comparison of while and do…while PROGRAM 6-8 Comparison of while and do…while Computer Science: A Structured Programming Approach Using C