A situation like this usually calls for a global variable.

However, in a few cases, global variables can be suitable for use.

- At level 2 we place global variables for our program.

The use of global variables makes software harder to read and understand.

An obvious solution is to never use a global variable in such a manner.

Global variables are set with the command and can be accessed from any routine.

The setting of a global variable can create side effects that are hard to locate and predict.

Static members of public classes can substitute for global variables and functions.

A outside a subroutine has no effect (global variables need not be declared).

QuickDraw maintains a number of global variables per process, chief among these being the current port.

As a result, becomes a global variable that can be accessed without the scope of the function.

There are also some built-in global variables such as "score" which exist independent of individual instances.

Global variables make separating code into reusable libraries more difficult.

The law says that messages can be sent only to the following: message argument, instance variable, new objects, and global variables.

A "global variable", or one with indefinite scope, may be referred to anywhere in the program.

Packages can also contain global variables which can be used throughout the package.

It displays the call stack, execution trace, global variables and the number of live objects.

This is necessary inside a multitasking environment to avoid organization problems with the stack, global variables and shared system resources.

As originally designed, Macintosh applications access data records and global variables within the operating system.

At this point, the code (functions) and data (global variables) will have unique run time addresses.

Worst case assumptions have to be made when function calls occur or global variables are accessed (because little information about them is available).

According to the analogy, the "customers" are threads, identified by the letter i, obtained from a global variable.

However, we can't say any such thing for because it uses a global variable that it modifies.

In case of name collision, local variables have precedence over global variables.

In addition, all variables are treated as global variables.