Chapter 2: Number Systems – Class 9 Computer Science (Punjab Board)
📌 Lecture Topic: Introduction to Number Systems and their Types
Welcome to Kulachi Pixel Academy! In this post, we’ll explore the key concepts from our YouTube lecture on Chapter 2 of the Class 9 Computer Science (New Syllabus 2025).
📖 What is a Number System?
A number system is a way to represent numbers using a set of symbols or digits. Computers use different number systems to store and process data efficiently.
Types of Number Systems:
- Decimal Number System (Base-10): Uses digits 0–9
- Binary Number System (Base-2): Uses digits 0 and 1
- Octal Number System (Base-8): Uses digits 0–7
- Hexadecimal Number System (Base-16): Uses 0–9 and A–F
🎥 Watch the Full Lecture on YouTube
Click the video below to watch the full explanation:
📌 Key Terms
- Digit: A single symbol used in a number system
- Base: The total number of digits used in a number system
- Positional Notation: A method where the position of a digit determines its value
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Posted by Inzamam Kulachi – Kulachi Pixel Academy
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Number System