C PROGRAM FOR PRIME NUMBER GENERATION

/* C PROGRAM FOR  PRIME NUMBER GENERATION */

#include<stdio.h>

#include<conio.h>

void main()

{

             int a,b,c=0,r;

 clrscr();

             printf("\n\t\tPRIME NUMBER");

             printf("\n\t\t~~~~~~~~~~~~~");

             printf("\nEnter range:");

             scanf("%d",&r);

             a=1;

            while(a<=r)

             {

                   b=1;c=0;

                   while(b<=a)

                   {

                      if(a%b==0)

                       c=c+1;

                       b++;

                   }           

             if(c==2)

             printf("\n %d is a prime number",a);

             a++;

           }

          getch();

}

         

OUTPUT:

      PRIME NUMBER

                ~~~~~~~~~~~~~

Enter range: 50

 2 is a prime number

 3 is a prime number

 5 is a prime number

 7 is a prime number

 11 is a prime number

 13 is a prime number

 17 is a prime number

 19 is a prime number

 23 is a prime number

 29 is a prime number

 31 is a prime number

 37 is a prime number

 41 is a prime number

 43 is a prime number

 47 is a prime number