Binary, Hexadecimal, Binary Finger Counting Tutorial

[ivanjs]

Here's a (hopefully) easy to understand tutorial I wrote on binary and hexadecimal, with a side tutorial thrown in on how to count in binary on your fingers using cartoon visuals.

There's also a shockwave version where you can see the "pattern" more clearly.

 

[kainjow]

While I was thinking of bits and bytes, I was wondering, what would be the most efficient way to determine if a number is even or odd?

bool isEven(int num)
{
    return ((num & 1) == 0);
}

or

bool isEven(int num)
{
    return (num % 2 == 0);
}

 

[Captain Code]

Modulus takes a lot of CPU cycles compared to binary AND.