Prime Numbers generation

#include<stdio.h>
int main()
{
        int i=2,j,n,r,c;
        printf("\n enter the range to be printed ");
        scanf("%d", &n);

        for(i=2;i<=n;i++)
        {
                c=0;

                for(j=1;j<=i;j++)
                {
                        r=(i % j);

                        if(r==0)
                {
                        c++;
                }
                }
if(c==2)
{
printf("\n %d",i);
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