IB Digital Society Topic 3.3C Uses and Forms of Computer Coding Revision Notes (SL/HL)

IB Digital Society Topic 3.3C Uses and Forms of Computer Coding Revision Notes (SL/HL) | RevisionDojo

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3.3C Uses and Forms of Computer Coding

What coding is

Coding (programming) is writing step-by-step instructions in a programming language so a computer can carry out a task.
A computer cannot guess what you want. So a human has to turn a fuzzy goal into exact, unambiguous steps. Coding is that translation between people and machines.
Every app, website, game and automated system exists because someone wrote code. The choices and blind spots of coders end up built into the digital world everyone else lives in.

Levels of language and abstraction

Machine code is the raw binary (1s and 0s) the processor runs directly: exactly what the hardware runs, but near-impossible for a person to read or write.
Assembly swaps binary for short mnemonics (ADD, MOV): still close to the hardware and processor-specific, but more readable.
High-level languages (Python, Java) use words and symbols close to English or maths. Whatever level you write at, code must become machine code before it can run.
Each step up is a layer of abstraction: it hides messy detail below so a programmer can think in bigger, more human ideas.
1. Abstraction makes modern software possible: programmers build on ready-made libraries and tools without understanding every layer, standing on the work of those before them.

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Definition

Paywall

(on a website) an arrangement whereby access is restricted to users who have paid to subscribe to the site.

anim nostrud sit dolore minim proident quis fugiat velit et eiusmod nulla quis nulla mollit dolor sunt culpa aliqua

Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.

Duis aute irure dolor in reprehenderit

Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.

Note

Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam quis nostrud exercitation.

Excepteur sint occaecat cupidatat non proident

Nemo enim ipsam voluptatem quia voluptas sit aspernatur aut odit aut fugit, sed quia consequuntur magni dolores eos qui ratione voluptatem sequi nesciunt. Neque porro quisquam est, qui dolorem ipsum quia dolor sit amet, consectetur, adipisci velit.

Tip

Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.

Lorem ipsum dolor sit amet, consectetur adipiscing elit.
Sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris.
Duis aute irure dolor in reprehenderit in voluptate velit esse cillum.

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3.3C Uses and Forms of Computer Coding

What coding is

Coding (programming) is writing step-by-step instructions in a programming language so a computer can carry out a task.
A computer cannot guess what you want. So a human has to turn a fuzzy goal into exact, unambiguous steps. Coding is that translation between people and machines.
Every app, website, game and automated system exists because someone wrote code. The choices and blind spots of coders end up built into the digital world everyone else lives in.

Levels of language and abstraction

Machine code is the raw binary (1s and 0s) the processor runs directly: exactly what the hardware runs, but near-impossible for a person to read or write.
Assembly swaps binary for short mnemonics (ADD, MOV): still close to the hardware and processor-specific, but more readable.
High-level languages (Python, Java) use words and symbols close to English or maths. Whatever level you write at, code must become machine code before it can run.
Each step up is a layer of abstraction: it hides messy detail below so a programmer can think in bigger, more human ideas.
1. Abstraction makes modern software possible: programmers build on ready-made libraries and tools without understanding every layer, standing on the work of those before them.

Definition

Paywall

(on a website) an arrangement whereby access is restricted to users who have paid to subscribe to the site.

anim nostrud sit dolore minim proident quis fugiat velit et eiusmod nulla quis nulla mollit dolor sunt culpa aliqua

Duis aute irure dolor in reprehenderit

Note

Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam quis nostrud exercitation.

Excepteur sint occaecat cupidatat non proident

Tip

Lorem ipsum dolor sit amet, consectetur adipiscing elit.
Sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris.
Duis aute irure dolor in reprehenderit in voluptate velit esse cillum.

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Topic 1 - Introduction - Digital Society1 subtopic

Topic 2 - Concepts - Digital Society7 subtopics

Topic 3 - Content - Digital Society7 subtopics

Topic 4 - Contexts - Digital Society7 subtopics

Topic 5 - Challenges and Interventions - Digital Society (HL)3 subtopics

IB Digital Society 3.3C Uses and Forms of Computer Coding Notes

Topic 1 - Introduction - Digital Society1 subtopic

Topic 2 - Concepts - Digital Society7 subtopics

Topic 3 - Content - Digital Society7 subtopics

Topic 4 - Contexts - Digital Society7 subtopics

Topic 5 - Challenges and Interventions - Digital Society (HL)3 subtopics

3.3C Uses and Forms of Computer Coding

What coding is

Levels of language and abstraction

anim nostrud sit dolore minim proident quis fugiat velit et eiusmod nulla quis nulla mollit dolor sunt culpa aliqua

Duis aute irure dolor in reprehenderit

Excepteur sint occaecat cupidatat non proident

Unlock the rest of this chapter with a free account

3.3C Uses and Forms of Computer Coding

What coding is

Levels of language and abstraction

anim nostrud sit dolore minim proident quis fugiat velit et eiusmod nulla quis nulla mollit dolor sunt culpa aliqua

Duis aute irure dolor in reprehenderit

Excepteur sint occaecat cupidatat non proident

Unlock the rest of this chapter with a free account