In nested for loops, more than one for statements are included in the body of the loop.
The number of iterations will be equal to number of iterations in the outer loop multiplied by the number of iterations in the inner loop.
Example
Following is the C program for nested for loop −
#include<stdio.h>
main( ){
int i,j;
for (i=1; i<=2; i++){
for (j=1;j<=2; j++){
printf ("%d", i*j);
}
}
}Output
When the above program is executed, it produces the following result −
1 2 3 4 5 6 Execution i*j i=1 j=1 1 j=2 2 i=2 j=1 2 j=2 4
The other related statements in C language are as follows −
- break
- continue
- goto
break
It is a keyword used to terminate the loop (or) exit from the block.
The control jumps to next statement after the loop (or) block.
break is used with for, while, do-while and switch statement.
When break is used in nested loops then only the innermost loop is terminated.
Example
Following is the C program for break statement −
#include<stdio.h>
void main( ){
int i;
for (i=1; i<=5; i++){
printf ("%d", i);
if (i= =3)
break;
}
}Output
When the above program is executed, it produces the following result −
1 2 3
continue
- It is a keyword which is used for continuing the next iteration of the loop.
- It skips the statements after the continue statement.
- It is used with for, while and do-while.
Example
Following is the C program for continue statement −
#include<stdio.h>
void main( ){
int i;
for (i=1; i<=5; i++){
if (i==2)
continue;
printf("%d", i);
}
}Output
When the above program is executed, it produces the following result −
1 2 3 4 5
goto
It is used after the normal sequence of program execution by transferring the control to some other part of program.
Example
Following is the C program for goto statement −
#include<stdio.h>
void main( ){
printf("Hello");
goto l1;
printf("How are");
l1: printf("you");
}Output
When the above program is executed, it produces the following result −
Hello you