Generating multiplication table program in c

#include<stdio.h>

void main()
{
         int n,i;

printf("Enter a number");
scanf("%d",&n);

for(i=0;i<=20;i++)
    printf("%3d*%2d=%5d\n",n,i,n*i);

}

OUTPUT

9*1= 9
9*2= 18
9*1= 27
9*1= 36
9*1= 45
9*1= 54
9*1= 63
9*1= 72
9*1= 81
9*1= 90
9*1= 99
9*1= 108
9*1= 117
9*1= 126
9*1= 135
9*1= 144
9*1= 153
9*1= 162
9*1= 171
9*1= 180