# Binary

Binary refers to the "base 2" method of counting, in which only the digits 0 and 1 are used.

Binary is a high school-level concept that would be first encountered in a discrete mathematics course.

### Prerequisites

Base: | (1) In a number of system, the base is the number of distinct digits used to represent numbers. (2) In a logarithm, the base is the number with respect to which the power operation is inverted to form the logarithm. (3) In a geometric figure, the term base is used to refer to the bottom edge or surface. |

Integer: | An integer is one of the numbers ..., -2, -1, 0, 1, 2, .... |