how to use loops in c(for,while and do while).ppt

Loops in c

1. 1
6-5 Loops in C
C has three loop statements: the C has three loop statements: the whilewhile, the , the forfor, and the , and the
do…whiledo…while. The first two are pretest loops, and the. The first two are pretest loops, and the
the third is a post-test loop. We can use all of themthe third is a post-test loop. We can use all of them
for event-controlled and counter-controlled loops.for event-controlled and counter-controlled loops.
The while Loop
The for Loop
The do…while Loop
The Comma Expression
Topics discussed in this section:Topics discussed in this section:

2. 2
FIGURE 6-9 C Loop Constructs

3. 3
FIGURE 6-10 The while Statement

4. 4
FIGURE 6-11 Compound while Statement

5. 5
PROGRAM 6-1Process-control System Example

6. 6
PROGRAM 6-2A while Loop to Print Numbers

7. 7
PROGRAM 6-2A while Loop to Print Numbers

8. 8
PROGRAM 6-3Adding a List of Numbers

9. 9
PROGRAM 6-3Adding a List of Numbers

10. 10
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.
NoteNote

11. 11
FIGURE 6-14 Comparing for and while Loops

12. 12
PROGRAM 6-4 Example of a for Loop

13. 13
PROGRAM 6-4 Example of a for Loop

14. 14
PROGRAM 6-5A Simple Nested for Loop

15. 15
PROGRAM 6-5A Simple Nested for Loop

16. 16
FIGURE 6-15 do…while Statement

17. 17
PROGRAM 6-6 Two Simple Loops

18. 18
PROGRAM 6-6 Two Simple Loops

19. 19
FIGURE 6-16 Pre- and Post-test Loops

20. 20
PROGRAM 6-7Adding a List with the do…while

21. 21
PROGRAM 6-7Adding a List with the do…while

22. 22
FIGURE 6-17 Nested Comma Expression

23. 23
PROGRAM 6-8 Comparison of while and do…while

24. 24
PROGRAM 6-8 Comparison of while and do…while