a c program for prime count

#include<stdio.h>
#include<conio.h>
#include<math.h>

main(){
       int num;
       int n=2,div,k;
      
      
       printf("utpo how much do you want to count?__");                 
       scanf("%d",&num);
      
       start:
       for(n=n;n<=num;n++){
                           for(div=2;div<n;div++){
                                                   if(n%div==0){
                                                                n=n+1;
                                                                goto start;
                                                                }
                                                  
                                                  
                                                   }
                                                   printf("%d, ",n);
                           }       
                          
      
      
     
                                                
                                               
                                                
                  
      getch();
      }