Iteration

Test yourself

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.

1Introduction to Python

1.1Python

1.1.1Python

1.2Input & Output

1.2.1Input & Output

1.3Data Types

1.3.1Data Types

1.4Variables & Constants

1.4.1Variables & Constants

1.5Operators

1.5.1Arithmetic & Relational Operators

1.5.2Boolean & Assignment Operators 2

1.6Program Flow

1.6.1Selection

1.6.2Iteration

2Data Structures

2.1Lists & Strings

2.1.1Lists

2.1.2Strings

2.2File Handling

2.2.1File Handling

3Modularity

3.1Subroutines

3.1.1Subroutines

3.2Data Flow

3.2.1Data Flow

4Good Practice

4.1Naming & Whitespace

4.1.1Identifiers

4.1.2Whitespace

4.2Comments

4.2.1Comments

4.3Exceptions

4.3.1Exceptions

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