Answer / alex

here is answer
http://www.prepjunk.com/151/program-to-find-the-given-number-is-prime-or-not

Answer / Satyaveer Singh

Here's an example C program that checks if a given number is prime:
```c
#include<stdio.h>
void checkPrime(int n) {
int i;
for (i = 2; i <= sqrt(n); ++i) {
if (n % i == 0) {
printf("%d is not a prime number.n", n);
return;
}
}
printf("%d is a prime number.n", n);
}
int main() {
int num;
printf("Enter an integer: ");
scanf("%d", &num);
checkPrime(num);
return 0;
}
```

Answer / rabindra nath das

#include<stdio.h>
#include<conio.h>
void main()
int n,k,fl=0,r;
clrscr();
printf("\n Enter the number==>>");
scanf("%d",&d);
for(k=2;k<=n/2 && fl==0;k++)
{
r=n%k;
if(r==0);
fl=1;
}
if(fl==0)
printf("\n %d is a prime number",n);
else
printf("\n %d is not prime number",n);
getch();
}

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