Gray code

Gray code is a type of code used to represent numbers or other items in a way that makes it easy to convert between different types of numbers. It does this by using a sequence of numbers that each differ by only one bit. For example, the binary code for the number five is 101 and the Gray code for five is 100. When one number is changed to the other, like from five to four, the only different bit is the last one. This makes it easier to convert between different numbers without making mistakes.