∴
Octal System
Middle School
Definition
A number system using digits 0 through 7.
Formulas
(aₙa_n-1...a₁a₀)₈ = ∑_i=0ⁿ aᵢ · 8ⁱ
Octal to decimal conversion
Examples
Example 1
Convert octal 752₈ to decimal.
Example 2
Convert binary 110101₂ to octal.
Applications
Unix/Linux
File permissions (e.g., chmod 755)
Computer Science
Compact binary representation
Related Documents
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