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VARIABLE TYPES

• Variable types typically include INTEGER, REAL, BOOLEAN, CHARACTER and STRING
• In some programming languages, variables have to be declared at the start of the program so that the appropriate amount of memory can be reserved for them.

Improving readability of code

• You should always try to write program code that is easy to read, understand, debug and amend
• Two things you can do:
• Use descriptive names for your variables, constants and subprograms
• Use comments to state what the program or subprogram does and to explain how the code works