Identifiers
Computer Science: KS3, topic 2.3.10
Identifiers
Identifiers are the names given to variables, constants, and subroutines.
Variables
- Variables should have lowercase names, with each word separated by an underscore. For example:
- this_is_my_variable
- user_money
- Variable should also have descriptive names, for example user_money is much better than this_is_my_variable.
Constants
- Constants should be named using the same rules as variables, but uppercase.
Subroutines
- Subroutines should have lowercase names, with each word separated by an underscore. For example:
- calculate_sum()
- get_user_id()
- Subroutines should have descriptive names where possible.
Global rules
- In general, all identifiers should be descriptive.
- Characters which might be confused should be avoided, for example:
- 0 and O.
- 1 and l (lower case L).
Test yourself on Identifiers
Which character should separate each word in variable and constant identifiers?
Which of the following are suitable names for constants?