This document discusses nested loops, which are loop statements inside other looping statements. It provides examples of nested for loops, while loops, and do-while loops. The nested for loop runs the inner loop as many times as the limit of the outer loop condition. The nested while loop executes the inner code block as long as the inner condition is true, and the outer block as long as the outer condition is true. The nested do-while similarly runs the inner block first and checks the inner condition, and the outer block first and checks the outer condition. Examples are given to print a diamond pattern using nested loops.

1. PL LAB # 4
NESTED LOOPS
Submitted To: Miss Uzma
Submitted On: 17th January 18
Submitted By: Erum Shamim, Ifra Batool, Rabbia Nasir

2. NESTED LOOPS
In many cases we may use loop
statement inside another looping
statement.This type of looping is
called nested looping.

3. TYPES OF NESTED LOOP
 NESTED FOR LOOP
 NESTED WHILE LOOP
 NESTED DO-WHILE LOOP

4. NESTED FOR LOOP
A for loop inside another for loop is
called nested for loop.

5. SYNTAX
NOTE: The inner loop runs as many times as there is the limit of
the condition of the external loop. This loop runs as long as the
condition in the parenthesis is true.
for (initialization; condition; increment/decrement)
{
for (initialization; condition;
increment/decrement)
{
body of the loop;
}
}

6. FLOWCHART

7. EXAMPLE

8. PROGRAM TO PRINT
DIAMOND

9. OUTPUT

10. NESTED WHILE LOOP
Using while loop within while loop is said to be
nested while loop.
It is used to execute a set of code for multiple
times as long as the condition is true.
Once the condition becomes false the code
block is no longer executed.

11. SYNTAX
while(test condition)
{
while (test condition)
{
Body of the inner loop;
}
Body of the outer loop;
}

12. FLOWCHART

13. EXAMPLE

14. EXAMPLE

15. NESTED DO-WHILE LOOP
A do-while loop inside another do-
while loop is called nested do-while
loop.

16. do
{ do
{
Body of the inner loop;
}
while (condition of the inner loop);
Body of the outer loop;
}
while (condition of the outer loop);
SYNTAX

17. FLOWCHART

18. EXAMPLE

19. EXAMPLE