C – Nested For Loop

Nested for loop:

• Defining for loop inside another for loop.
• Nested loops are mainly used to process two-dimensional data (Rows & Columns)
• Outer loop represents number of rows
• Inner loop represents number of columns.

Following program prints the combinations of outer loop and inner loop variable values:

#include<stdio.h> int main() {             int i, j;             for(i=1 ; i<=5 ; i++)             {                         for(j=1 ; j<=5 ; j++)                         {                                     printf(“(%d,%d)\t”, i, j);                         }                         printf(“\n”);             }             return 0; }

Output:
(1,1)   (1,2)   (1,3)   (1,4)   (1,5)
(2,1)   (2,2)   (2,3)   (2,4)   (2,5)
(3,1)   (3,2)   (3,3)   (3,4)   (3,5)
(4,1)   (4,2)   (4,3)   (4,4)   (4,5)
(5,1)   (5,2)   (5,3)   (5,4)   (5,5)