How to use nesting for loop in C language

#include <stdio.h>
int main()
{
  int i, j;
  for (i = 1; i <= 3; i++)
  {
      printf("i = %d\n", i);
      for (j = 1; j <= 5; j++)
      {
          printf("j = %d\t", j);
      }
      printf("\n");
  }
  return 0;
}

i = 1
j = 1	j = 2	j = 3	j = 4	j = 5	
i = 2
j = 1	j = 2	j = 3	j = 4	j = 5	
i = 3
j = 1	j = 2	j = 3	j = 4	j = 5