How to calculate the amount of memory occupied by the variable in Pascal?

I need to calculate the amount of memory that any variable takes. Thanx for any input.

EDITED: I didn't notice that I need to开发者_Python百科 calculate it manually (by hand). Thanx

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SizeOf(variable)

of course that only goes for the variable not to any additional memory the variable might point to, or any alignment if it is part of a structured type.