# NOT Operation

Like OR and AND operation, the **NOT Operation** is also an important function in the digital electronic circuit. It is denoted by a bar. The binary not operation is also known as not function or complement function or bit invert function.The not operation has only one input and one output**. **The input and output of the not operation are either zero or one. In the negative logic 0 stands for high and 1 stands for low signals.The not operation will always produce a 0 out if their input is 1 and if their input is 0 then it produces the 1 output.

Their operation is analogous to negative operation which has single input and output.This operation is explained by the example shown below. **Example:** Consider the word statement ** Z = A Not A**. In boolean algebra it isexpressed as

For the given operation the output can be expressed as

The** NOT operation** is an inversion as shown below by the truth table. It is read as “ not x is equal to z”.

x | z |
---|---|

0 | 1 |

1 | 0 |

When the value of x is equal to 0 the value of z is equal to z. When x is equal to 1 the value of z is equal to 0.

** Also See:**: AND Operation

** Also See:** OR Operation