noun

Binary numbers are like a secret code. They are made up of only two numbers: 0 and 1. Computers use binary numbers to understand information and do things. It is like a secret language that only computers can understand.

example

1. The binary number 10101 represents the decimal number 21.
2. In binary, the number 110101 represents the decimal number 53.
3. The binary number 10010101 represents the decimal number 149.