Iteration

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Iteration

Iteration allows a group of statements to be repeated multiple times. Iteration statements are often called loops.

Indefinite iteration

A block of code will repeat whilst a specified condition is true.
For example: the while loop will continue to execute an indented code block while a certain condition is true.

Definite iteration

A block of code will repeat a known number of times.
For example: a for loop will execute an indented block for each value in a list of values.

Flow diagram

A flow diagram for iteration uses the diamond shape.

Introduction to Python

1.1

Python

1.1.1Python

1.2

Input & Output

1.2.1Input & Output

1.3

Data Types

1.3.1Data Types

1.4

Variables & Constants

1.4.1Variables & Constants

1.5

Operators

1.5.1Arithmetic & Relational Operators 1.5.2Boolean & Assignment Operators 2

1.6

Program Flow

1.6.1Selection 1.6.2Iteration

Data Structures

2.1

Lists & Strings

2.1.1Lists 2.1.2Strings

2.2

File Handling

2.2.1File Handling

Modularity

3.1

Subroutines

3.1.1Subroutines

3.2

Data Flow

3.2.1Data Flow

Good Practice

4.1

Naming & Whitespace

4.1.1Identifiers 4.1.2Whitespace

4.2

Comments

4.2.1Comments

4.3

Exceptions

4.3.1Exceptions

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