Computer science AQA GCSE paper 1

I literally studied for the wrong mock so this is very last minute AHHHHHHHH

Advantages of using subroutines

• The code doesn’t have to be repeated every time it needs to run

• Easier to modify logic, since only the subroutine will need to be edited rather than editing numerous places in the code

Local variables

Are only useable within that part of the code. Eg a local variable in a subroutine cannot be used in the main code

Function

Similar to a subroutine but returns a value, (parameters for that value are in brackets next to function)

arrays

• have to contain the same data type

• Fixed size (so data cannot be added)

Records

• Can have multiple data types

• Can have data added to it

Parameter

Is a way of passing a value to a subroutine

Return

In a function this value can be returned, usually something has to be done with it or it is stored in the main code.