2.1.2

Comments

Test yourself on Comments

Test your knowledge with free interactive questions on Seneca — used by over 10 million students.

Comments

Comments are lines of code that are ignored completely by the computer.

What are comments?

What are comments?

A comment is a line of code that is completely ignored by the computer.

Purpose of comments

Purpose of comments

Comments can be used to add description to your code to make it easier for other people to understand.
They can also be used to leave notes and reminders to yourself as you work on a complex program.

How to comment

How to comment

To write a comment in most languages, you must use a special character which tells the computer to ignore the rest of the line:
- In Python, that character is a #.
- In C-style languages it is //.
The exact character depends on the language being used.

1

Computational Thinking & Algorithms

1.1

Computational Thinking

1.1.1Abstraction Thinking 1.1.2Decomposition Thinking 1.1.3Algorithmic Thinking

1.2

Algorithms

1.2.1Algorithms 1.2.2Pseudocode 1.2.3Flow Diagrams 1.2.4Logical Reasoning & Debugging 1.2.5Reading Algorithms 1.2.6Correcting Algorithms 1.2.7Complete the Algorithm 1.2.8Search Algorithms 1.2.9Linear Search 1.2.10Binary Search 1.2.11Sort Algorithms 1.2.12Bubble Sort 1.2.13Insertion Sort 1.2.14End of Topic Test - Algorithms

2

Programming

3

Hardware & Software

3.1

Hardware

3.1.1Elements of Computer Systems 3.1.2Central Processing Unit (CPU)3.1.3Registers of the Central Processing Unit (CPU)3.1.4Factors Affecting CPU Performance 3.1.5Fetch-Decode-Execute Cycle 3.1.6Binary Systems 3.1.7Logic Circuits 3.1.8Boolean Logic 3.1.9End of Topic Test - Logic

3.2

Software

3.2.1System Software

4

Data

4.1

Representing Data

4.1.1Binary 4.1.2Converting Binary & Hexadecimal 4.1.3Converting Denary & Hexadecimal 4.1.4Binary Arithmetic 4.1.5Representing Sound 4.1.6Representing Images 4.1.7Character Sets 4.1.8American Standard Code for Information Interchange 4.1.9Unicode 4.1.10End of Topic Test - Representation

5

The Internet

5.1

Networks

5.1.1Networks 5.1.2Geographical Classification of Networks 5.1.3What is the Internet?5.1.4The World Wide Web 5.1.5Uniform Resource Locators (URLs)5.1.6Web Hosting 5.1.7HTML 5.1.8Searching the World Wide Web 5.1.9Good Searching Tips 5.1.10Are You Looking at Reliable Information?

6

Online Safety & Security

6.1

Protecting Yourself Online

6.1.1Digital Footprints 6.1.2Leaving a Safe Online Footprint 6.1.3Online Safety 6.1.4Malware - Viruses 6.1.5Malware 6.1.6People Online 6.1.7Your Feelings 6.1.8Getting Help

6.2

Computing and the Law

6.2.1Data Protection Act (1998)6.2.2Computer Misuse Act (1990)6.2.3Freedom of Information Act (2000)6.2.4Plagiarism 6.2.5Copyright 6.2.6Copyright Designs and Patents Act (1988)6.2.7Creative Commons Licensing

Jump to other topics

1

Computational Thinking & Algorithms

1.1

Computational Thinking

1.1.1Abstraction Thinking 1.1.2Decomposition Thinking 1.1.3Algorithmic Thinking

1.2

Algorithms

1.2.1Algorithms 1.2.2Pseudocode 1.2.3Flow Diagrams 1.2.4Logical Reasoning & Debugging 1.2.5Reading Algorithms 1.2.6Correcting Algorithms 1.2.7Complete the Algorithm 1.2.8Search Algorithms 1.2.9Linear Search 1.2.10Binary Search 1.2.11Sort Algorithms 1.2.12Bubble Sort 1.2.13Insertion Sort 1.2.14End of Topic Test - Algorithms

2

Programming

3

Hardware & Software

3.1

Hardware

3.1.1Elements of Computer Systems 3.1.2Central Processing Unit (CPU)3.1.3Registers of the Central Processing Unit (CPU)3.1.4Factors Affecting CPU Performance 3.1.5Fetch-Decode-Execute Cycle 3.1.6Binary Systems 3.1.7Logic Circuits 3.1.8Boolean Logic 3.1.9End of Topic Test - Logic

3.2

Software

3.2.1System Software

4

Data

4.1

Representing Data

4.1.1Binary 4.1.2Converting Binary & Hexadecimal 4.1.3Converting Denary & Hexadecimal 4.1.4Binary Arithmetic 4.1.5Representing Sound 4.1.6Representing Images 4.1.7Character Sets 4.1.8American Standard Code for Information Interchange 4.1.9Unicode 4.1.10End of Topic Test - Representation

5

The Internet

5.1

Networks

5.1.1Networks 5.1.2Geographical Classification of Networks 5.1.3What is the Internet?5.1.4The World Wide Web 5.1.5Uniform Resource Locators (URLs)5.1.6Web Hosting 5.1.7HTML 5.1.8Searching the World Wide Web 5.1.9Good Searching Tips 5.1.10Are You Looking at Reliable Information?

6

Online Safety & Security

6.1

Protecting Yourself Online

6.1.1Digital Footprints 6.1.2Leaving a Safe Online Footprint 6.1.3Online Safety 6.1.4Malware - Viruses 6.1.5Malware 6.1.6People Online 6.1.7Your Feelings 6.1.8Getting Help

6.2

Computing and the Law

6.2.1Data Protection Act (1998)6.2.2Computer Misuse Act (1990)6.2.3Freedom of Information Act (2000)6.2.4Plagiarism 6.2.5Copyright 6.2.6Copyright Designs and Patents Act (1988)6.2.7Creative Commons Licensing

Practice questions on Comments

Can you answer these? Test yourself with free interactive practice on Seneca — used by over 10 million students.

1
How do you start a comment in Python?Multiple choice
2
How do you start a comment in a C-style language?Multiple choice

Answer all questions on Comments

Unlock your full potential with Seneca Premium

Unlimited access to 10,000+ open-ended exam questions
Mini-mock exams based on your study history
Unlock 800+ premium courses & e-books

Get started with Seneca Premium

Variables & Constants

Input & Output