Why following code is not looping through m?

Question

The following code is not outputting the desired result. It is only getting iterated through n, not y. Why and how to fix it?

int product(int m,int n){
    int x,p;
    while(m>=100){
        while(n>=100){
            printf("Value of m= %d and n=%d\n",m,n );
            x=m*n;
            p=palindrome(x);
            if (p==0)
            {
                printf("These two numbers are %d and %d\n",m,n );

            }
            n--;
        }
        m--;

    }
    return 0;
}

Answer 1

Because `n' is not any more >= 100. So the external loop iterates but is never entering the internal after the first one.

The solution: Be careful!!!! - if you execute it online you will kill your browser :)

int product(int m,int n){
    int x,p, savedn = n;
    while(m>=100){
        while(n>=100){
            printf("Value of m= %d and n=%d\n",m,n );
            x=m*n;
            p=palindrome(x);
            if (p==0)
            {
                printf("These two numbers are %d and %d\n",m,n );

            }
            n--;
        }
        m--;
        n = savedn;

    }
    return 0;
}