Nested loops

Nested Loops
By:
Adnan Ferdous Ahmed

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

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

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

 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.

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
}

#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:-

#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

Any questions regarding this topic?

Nested loops

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