The document discusses nested loops in programming. It defines a loop as a sequence of instructions repeated until a condition is reached. A nested loop is a loop inside another loop. It provides examples of nested while, do-while, and for loops to print series of numbers. The nested loops examples ensure the inner loop completes before moving to the next iteration of the outer loop.

1. Nested Loops
By:
Adnan Ferdous Ahmed

2. •What is a loop?
•What is a nested loop?
•Loops used in nested loops
•Nested while loops
•Nested do…while loops
•Nested for loops

3. a loop is a sequence of
instructions that is
continually repeated
until a certain condition is
reached.

4. •A loop inside another loop
is called a nested loop.

6.  while loops may be nested, that is we
can put a while loop inside another
while loop.
However, we must start the inner loop
after starting the outer loop and end the
inner loop before ending the outer loop for
a
logically correct nesting.

8. To print the following series:-
1
1 2
1 2 3
1 2 3 4
1 2 3 4 5
#include<stdio.h>
Int main()
{
int r=1,c=1;
while (r<=5)
{
c=1;
while(c<=r)
{
printf(“%d”,c);
c++;
}
printf(“n”)
r++;
}
return
}

11. #include<stdio.h>
int main()
{
int a;
do
{
printf(“Enter any number”);
scanf(“%”,&a);
if (a>=0)
printf(“Number is positive”);
else
printf(“Number is Negative”);
}
while(a!=0);
return 0;
}
Enter any number : 1
Number is positive
To print the following:-

14. #include<stdio.h>
int main()
{
int r,c,k=1;
for (r=1;r<=4;r++)
{
for (c=1;c<=r; c++)
{
printf(“%d”,k);
k++;
}
printf(“n”);
}
return 0;
}
To print the following:-
1
2 3
4 5 6
7 8 9 10

15. Any questions regarding this topic?