5d ago

Infallible Code

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144 comments

 undefined

    
private bool isEven(int number){
        bool result = true;
        while (number > 0){
            number = number - 1;
            if (result == true)
                result = false;
            else
                result = true;
        }
        return result;
    }

(P.S.: Only works for positive numbers)

This works for both positive and negative numbers:

 undefined

    
private static bool isEven(int number)
{
    bool result = true;

    while (number < 0)
    {
        number = number - 1;
        if (result == true)
            result = false;
        else
            result = true;
    }
    while (number > 0)
    {
        number = number - 1;
        if (result == true)
            result = false;
        else
            result = true;
    }
    return result;
}

Output:

 undefined

    
isEven(4) = True
isEven(5) = False
isEven(-4) = True
isEven(-5) = False

144 comments