multiplication table printer in c

multiplication table printer in c

#include<stdio.h>
#include<stdlib.h>
#define colmax 10
#define rowmax 12
int main()
{
int i,j,sum=1;//initializing variables

for(i=1;i<=rowmax;i++)//this iterates rows from 1 to 12
    {

    for(j=1;j<=colmax;j++)//this iterates colums from 1 to 10 everytime
        {
        sum=i*j;//and this multiplies all iterated elements to row number
        printf("|%4d",sum);//printing the iterated and multiplied elements 

        }
        printf("\n");
 printf("------------------------------------------------------|");
 printf("\n");
    }
return 0;
}