The word binary’ describes a system that has only two possible digits. To understand this, let’s first compare this to a system you’re probably more familiar with the decimal system.
The word ‘decimal’ describes a system that has ten possible digits. These are the digits 0 through 9. Every number expressed in the decimal system is a combination of these ten digits.
You use the decimal system every day, it comes naturally. We all have 10 fingers and 10 toes, and some of us use those 10 fingers to help with everyday addition and subtraction.
The binary system works essentially the same way, with the only difference being that it only has two digits. These are visually expressed by the digits 0 e and 1.
Every number expressed in the binary system is a combination of these two digits. Binary arithmetic is different from the arithmetic that you do, using the decimal system.