Write a c program to generate all prime numbers between 1 to n

/*------------------------------------------------------------------------------------------------

Program    : Write a c program to generate all prime numbers between 1 to n.

Created By: JABIR DAUD PATHAN

Branch       : COMPUTER ENGINEERING

-------------------------------------------------------------------------------------------------*/

//----------------------  Header Files  ----------------------------------

#include<stdio.h>

#include<conio.h>

//----------------------  Main Function  --------------------------------

void main()

 {

  int no,i; 

  clrscr();

  printf("Enter any number or Range==>");

  scanf("%d",&no); 

  for(i=1;i<=no;i++) 

   {

    if(i==1||i==2||i==3||i==5||i==7) 

     {

      printf("\t%d",i);

     }

    else

     if(i%2>0&&i%3>0&&i%5>0&&i%7>0) 

      {

       printf("\t%d",i);

      }

   }

  getch();

 }

//---------------------  End of Main Function  --------------------------

/*-----------------<< OUTPUT SCREEN  >>-------------------*/

Enter any number or Range==>15

            1       2       3       5       7       11      13