C - Nested loop
Nested loop is a loop inside another loop, it is useful when you want to print numbers in rows and columns form like in 2d arrays or to print a pattern.
Example 1: Nested for loop.
for (i=1; i<=10; i++)
{
for (j=1; j<=10; j++)
{
printf("%d\n", a++);
}
}
The above code will execute up to 100 times.
Example 2: Nested while loop.
int i=1, j=1, a=1;
while (i<=10)
{
while (j<=10)
{
printf("%d\n", a++);
j++;
}
i++;
}
The above code will execute up to 100 times.
Example 3: Nested do while loop.
int i=1, j=1, a=1;
do{
do{
printf("%d\n", a++);
j++;
}while (j<=10);
i++;
}while (i<=10);
The above code will execute up to 100 times.
How to use Nested Loop
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