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Octal Number System

Definition

The octal number system is a base-8 number system that uses only the digits 0-7. It is often used in computer programming to represent and manipulate binary numbers in a more concise way.

Usage

Sense 1: Number Representation

In the octal number system, a number is represented using digits ranging from 0 to 7. Each digit's position represents a power of 8. For example, the octal number 53 is equivalent to (5 * 8^1) + (3 * 8^0) in decimal. Octal numbers are often denoted with a leading zero, such as 045.

Example Sentences:

1. In the octal number system, the digit 7 is the highest digit and represents the value 7 * 8^0 or simply 7.
2. The octal representation of the binary number 1011 is 13.

Sense 2: Permissions in Linux

In the Linux operating system, octal numbers are used to represent file permissions. Each digit in a three-digit octal number corresponds to read, write, and execute permissions for the owner, group, and others respectively.

Example Sentences:

1. The octal number 644 in Linux file permissions means that the owner has read and write permissions, while the group and others have read-only permissions.
2. A file with octal permission 777 allows everyone to read, write, and execute the file.

Related Products

Check out some books and resources to learn more about the octal number system:

• Octal Number System Books on Amazon