Programming

Decomposition

Breaking down a problem into smaller problems to make it less complex

Abstraction

Removing irrelevant details to make something simpler

Algorithmic Thinking

Using decomposition to make a repeatable set of instructions

Validation

Checking input data is sensible and in the correct format

Sanitisation

Hiding data so it can't be seen

Authentication

Verifying the identity of a user

Maintainability

Ensuring a program is easy to understand

Testing

Checking for errors

Two types of subprograms

Procedures and functions

Procedure

A subprogram that performs a specific task

Function

A procedure that manipulates data