Introduction to Subroutines (AQA GCSE Computer Science)
Revision Note
Written by: James Woodhouse
Reviewed by: Lucy Kirkham
Introduction to Subroutines
What is a subroutine?
Subroutines are an out of line block of code that may be called by simply writing their name in a program
Subroutines are given a unique name so they can be called anywhere in a program
There are many benefits to using subroutines, these include
Making bigger problems easier to break down (decompose) and code
Allows team members to be able to work on different parts of a problem
Makes the program easier to debug
Makes programs more efficient as code is not duplicated
More detailed information about subroutines can be found in the 'Structured Programming' section
Meaningful Identifiers
What are meaningful identifiers?
Meaningful identifiers are sensible names used for variables, constants or subroutines
A meaningful identifier must be used to help aid the maintainability of a program
An example would be a variable used for an input of a users' first name
Meaningful Identifier | Poor Identifier |
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Examples of using subroutines
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