IB Computer Science Topic D.3.4 Repetition Statements Revision Notes (SL/HL)

IB Computer Science Topic D.3.4 Repetition Statements Revision Notes (SL/HL) | RevisionDojo

Repetition Statements

A repetition statement is a control structure that allows a set of instructions to be executed multiple times based on a condition or a specified number of iterations.

Note

Repetition statements are also known as loops.
The formal term for repetition is iteration.

There are three main types of repetition statements:

For loops: Used when the number of iterations is known.
While loops: Used when the number of iterations is unknown and depends on a condition.
Do...while loops: Similar to while loops, but the condition is checked after the loop body is executed, ensuring the loop runs at least once.

Tip

Use for loops when you know exactly how many times you want to repeat a block of code.
Use while loops when the repetition depends on a condition that may change during execution.

For loops

A for loop is a repetition statement that iterates a specific number of times, controlled by an initialisation, a condition, and an increment or decrement operation.
Its general structure is:

for (initialization; condition; update) {
    // loop body
}

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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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Repetition Statements

A repetition statement is a control structure that allows a set of instructions to be executed multiple times based on a condition or a specified number of iterations.

Note

Repetition statements are also known as loops.
The formal term for repetition is iteration.

There are three main types of repetition statements:

For loops: Used when the number of iterations is known.
While loops: Used when the number of iterations is unknown and depends on a condition.
Do...while loops: Similar to while loops, but the condition is checked after the loop body is executed, ensuring the loop runs at least once.

Tip

Use for loops when you know exactly how many times you want to repeat a block of code.
Use while loops when the repetition depends on a condition that may change during execution.

For loops

A for loop is a repetition statement that iterates a specific number of times, controlled by an initialisation, a condition, and an increment or decrement operation.
Its general structure is:

for (initialization; condition; update) {
    // loop body
}

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.

IB Computer Science D.3.4 Repetition Statements Notes

IB Computer Science D.3.4 Repetition Statements Notes

Repetition Statements

For loops

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

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Repetition Statements

For loops

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

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IB Computer Science D.3.4 Repetition Statements Notes

1. System fundamentals2 subtopics

2. Computer organization1 subtopic

3. Networks1 subtopic

4. Computational thinking, problem-solving and programming3 subtopics

5. Abstract data structures (HL)1 subtopic

6. Resource management (HL)1 subtopic

7. Control (HL)1 subtopic

A. Databases4 subtopics

B. Modelling and simulation4 subtopics

C. Web science6 subtopics

D. Object-oriented programming (OOP)4 subtopics

IB Computer Science D.3.4 Repetition Statements Notes

1. System fundamentals2 subtopics

2. Computer organization1 subtopic

3. Networks1 subtopic

4. Computational thinking, problem-solving and programming3 subtopics

5. Abstract data structures (HL)1 subtopic

6. Resource management (HL)1 subtopic

7. Control (HL)1 subtopic

A. Databases4 subtopics

B. Modelling and simulation4 subtopics

C. Web science6 subtopics

D. Object-oriented programming (OOP)4 subtopics

Repetition Statements

For loops

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

Repetition Statements

For loops

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