Write a C program to read a positive number integer less than 20 and display its multiplication table.

#include<stdio.h>

#include<conio.h>

void main()

  {

    int n,i;

    clrscr();

    printf("\n Enter positive number less than 20:");

    scanf("%d",&n);

    if(n>0 && n<20)

    {

    for(i=1;i<=10;i++)

    printf("\n%d X %d = %d",n,i,n*i);

    }

    else

    printf("\n Invalid number");

  getch();

  }