Python for GCSE

6.4: understand the need for, and how to use, global and local variables when implementing subprograms

Sub programs
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global variablea variable which can be accessed from anywhere in a program
local variablea variable which can only be read / written within a particular part of a program
scopethe part of a program where a variable can be accessed.
variablememory storage location with a name that can store an individual value. The value can change when the program runs.
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