Answer Posted / nitesh sanwal

#include<stdio.h>
#include<math.h>
void main()
{
int n,i,prime=1;
printf("input the numbers");
scanf("%d",&n);
for(i=2;i<=sqrt(n);i++)
if(n%i==0)
{
prime=0;
break;
}
if(prime)
printf("%d is a prime number",n);
else
printf("%d is a not a prime number",n);
}

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