Difference between revisions of "Global variables"
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{{Global variables}} | {{Global variables}} | ||
| − | A global [[Variable]] is a variabe that is declared in the main section of a program or the interface part of a unit. Globals declared in a program cannot be accessed from within a unit. Globals declared in a unit can be accessed from within a program or another unit. | + | A global [[Variable|variable]] is a variabe that is declared in the main section of a [[Program|program]] or the [[Interface|interface]] part of a [[Unit|unit]]. Globals declared in a program cannot be accessed from within a unit. Globals declared in a unit can be accessed from within a program or another unit. |
| − | + | <syntaxhighlight> | |
| − | + | program GlobalVariables; | |
| − | + | var | |
| − | + | g: integer; | |
| − | + | begin | |
| + | end. | ||
| + | </syntaxhighlight> | ||
'''g''' is a global variable. | '''g''' is a global variable. | ||
| Line 14: | Line 16: | ||
== External variable == | == External variable == | ||
| − | External variable is a global variable has been declared in | + | External variable is a global variable has been declared in unit interface section. |
== Read More == | == Read More == | ||
* [[Var]] | * [[Var]] | ||
* [[Local_variables]] | * [[Local_variables]] | ||
| − | |||
| − | |||
Revision as of 22:56, 13 January 2019
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A global variable is a variabe that is declared in the main section of a program or the interface part of a unit. Globals declared in a program cannot be accessed from within a unit. Globals declared in a unit can be accessed from within a program or another unit.
program GlobalVariables;
var
g: integer;
begin
end.g is a global variable.
External variable
External variable is a global variable has been declared in unit interface section.
