|Previous||Table of Contents||Next|
A Gentle Introduction
The use directive allows you to use a module in your Perl program. For example, to include the Cwd module in your program, simply place the following somewhere in your code:
It doesn't matter where in your code you place the use Cwd, although for clarity and maintainability, it should probably be placed near the beginning of the program.
You may recall that we used the following module in Hour 10, "Files and Directories." At that time, however, you didn't know how it worked. When you run a program with use Cwd, what actually happens is this:
That's all there is to it. Once Perl has read your entire program, it's ready to run, using all the functionality that the module provides.
By the Way
You might notice that use strict looks a lot like use Cwd. Without confusing the issue too much, let's just say that the use statement is a general-purpose instructionto the Perl interpreter to do something (this is called a pragma). In the case of use strict, it changes the behavior of the interpreter to be strict about references and bare words; there is no module called s