Question

Am running this C program, but instead of answering “The answer is 10”, it sends back the message: “The answer is 0”, even though it breaks at the right time.

Can you tell me what’s wrong?

---

#import <Foundation/Foundation.h>

int main (int argc, const char * argv[])
{
    int i;
    for(int i = 0; i < 12; i++){
        printf("Checking i = %d\n", i);
        if(i + 90 == i * i) {
            break;
        }
    }
    printf("The answer is %d.\n", i);
}

Answer 1

The problem is you have two i‘s.

int main (int argc, const char * argv[])
{
    int i; //Declares outer i
    for(int i = 0; i < 12; i++) //Declares a NEW i
    {
        printf("Checking i = %d\n", i);
        if(i + 90 == i * i) 
        {
            break;
        }
    }
    printf("The answer is %d.\n", i); //Uses the outer i
}