Answer Posted / satwant singh

#include<stdio.h>
#include<conio.h>
void main()
{
long int a,b,i;
clrscr();
printf("enter start no");
scanf("%ld",&a) ;
printf("enter last no");
scanf("%ld",&b);
for(i=a;i<=b;i++)
{
if((i%2==0)||(i%3==0)||(i%5==0)||(i%7==0))
{
//printf("not prime==%ld",i);
}
else
printf("its prime==%ld\n",i);
}

getch();

}

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