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Friday, June 10, 2011

check given number is prime number or not using c program

#include<stdio.h>
int main(){
    int num,i,count=0;
    printf("\nEnter a number:");
    scanf("%d",&num);
    for(i=2;i<=num/2;i++){
        if(num%i==0){
         count++;
            break;
        }
    }
   if(count==0)
        printf("%d is a prime number",num);
   else
      printf("%d is not a prime number",num);
   return 0;
}

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