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Introduction to NOT Operator

The Bitwise NOT operator evaluates the binary representation of the value of a single input. If the bit contains 1, the output will be 0 for that bit location. If the bit contains 0, the output will be 1.

Gopi Gorantala
Gopi Gorantala
1 min read

Introduction

This lesson introduces the tilde '~' character. This is applied to a single operand and inverts each input operand's bit.

Sketch

This is the same as the NOT gate we studied in the digital electronics chapter shown below:

What is the Bitwise NOT operator?

The Bitwise NOT operator is denoted by ~.

The Bitwise operator evaluates the binary representation of the value of a single input. The Bitwise complement of the binary representation is determined for each bit in the binary representation. If the bit contains 1, the output will be 0 for that bit location. If the bit contains 0, the output will be 1.

Syntax

~a
  • 1 => yields 0
  • 0 => yields 1

Bitwise ~ Table

a ~a
1 0
0 1

Truth table

a ~a
True False
False True

Let’s see some of the Bitwise NOT operator examples in the next lesson.

Bit ManipulationData Structures and Algorithms

Gopi Gorantala Twitter

Gopi is an engineering leader with 12+ of experience in full-stack development—a specialist in Java technology stack. He worked for multiple startups, the European govt, and FAANG in India and Europe.

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