C program representing multiplication table

Question

Write a program to print the multiplication table from 1 x 1 to 12 x 10 in the format given below:

1 2 3 4 5 6 7 8 9 10
2 4 6 8 ……………….20
3 6 9…………………….30
4 8 12 16……………..40
-
-
-
12 24……………………..120

Solution

Use two nested do while loops to display the multiplication table.

The logic used to display the multiplication table is as follows:

The inner loop is controlled by the variable column. Whenever the outer loop is executed once, the inner loop will be executed 10 times.

The outer loop is executed 12 times, controlled by the variable row.

do /*......OUTER LOOP BEGINS........*/{
   column = 1;
   do /*.......INNER LOOP BEGINS.......*/{
      y = row * column;
      printf("%4d", y);
      column = column + 1;
   }
   while (column <= COLMAX); /*... INNER LOOP ENDS ...*/
   printf("</p><p>");
   row = row + 1;
}
while (row <= ROWMAX);/*..... OUTER LOOP ENDS .....*/

Example

The following is a C program to print the multiplication table−

Real-time demonstration

#include<stdio.h>
#define COLMAX 10
#define ROWMAX 12
main(){
   int row,column, y;
   row = 1;
   printf(" MULTIPLICATION TABLE </p><p>");
   printf("-----------------------------------------</p><p>");
   do /*......OUTER LOOP BEGINS........*/ {
      column = 1;
      do /*.......INNER LOOP BEGINS.......*/ {
         y = row * column;
         printf("%4d", y);
         column = column + 1;
      }
      while (column <= COLMAX); /*... INNER LOOP ENDS ...*/
      printf("</p><p>");
      row = row + 1;
   }
   while (row <= ROWMAX);/*..... OUTER LOOP ENDS .....*/
   printf("-----------------------------------------</p><p>");
}

Output

When the above program is executed , which produces the following output −

MULTIPLICATION TABLE
-----------------------------------------
 1  2  3  4  5  6  7  8   9  10
 2  4  6  8 10 12 14 16  18  20
 3  6  9 12 15 18 21 24  27  30
 4  8 12 16 20 24 28 32  36  40
 5 10 15 20 25 30 35 40  45  50
 6 12 18 24 30 36 42 48  54  60
 7 14 21 28 35 42 49 56  63  70
 8 16 24 32 40 48 56 64  72  80
 9 18 27 36 45 54 63 72  81  90
10 20 30 40 50 60 70 80  90 100
11 22 33 44 55 66 77 88  99 110
12 24 36 48 60 72 84 96 108 120
-----------------------------------------

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