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C - Write the program for prime numbers?




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asked marvit August 18, 2014 06:09 AM  

Write the program for prime numbers?


           

1 Answers



 
answered By bhjahnavi   0  
/* C program to check whether a number is prime or not. */

#include <stdio.h>
int main()
{
 int n, i, flag=0;
 printf("Enter a positive integer: ");
 scanf("%d",&n);
 for(i=2;i<=n/2;++i)
 {
   if(n%i==0)
   {
     flag=1;
     break;
   }
 }
 if (flag==0)
   printf("%d is a prime number.",n);
 else
   printf("%d is not a prime number.",n);
 return 0;
}
output:
Enter a positive integer: 29
29 is a prime number.

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