Global variables
From Free Pascal wiki
Jump to navigationJump to searchA 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.