1a.Program in C for obtaining prime numbers up to a given number*/

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

main()
{
int i,j,n;
int count[100];
printf("enter the range between 1 and 100 to print the prime numbers");
scan("%d",&n);
for(i=1;i<=n;i++)
   for(j=1;j<=i;j++)
      if(i%j==0)
         count[i]=count[i]+1;
 printf("The prime numbers are");


for(i=1;i<=n;i++)
   if(count[i]==2)
        printf(" %d",a[i]);

                                                                 
 }