Difference between revisions of "Global variables"
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| − | A global [[Variable|variable]] is defined in [[ | + | A global [[Variable|variable]] is one that is defined in the [[main program]] of a program or the main part of a unit. Globals declared in a program cannot be accessed from a unit, but globals in a unit can be accessed from a main program or a unit that accesses that unit. |
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var | var | ||
i:integer; | i:integer; | ||
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begin | begin | ||
end. | end. | ||
Revision as of 22:05, 13 January 2012
A global variable is one that is defined in the main program of a program or the main part of a unit. Globals declared in a program cannot be accessed from a unit, but globals in a unit can be accessed from a main program or a unit that accesses that unit.
var i:integer;
begin end.
i is a global variable.
External variable
External variable is a global variable has been declared in unit interface section.
