The eval command allows you to run the contents of variables as commands and can be very useful -- especially in scripts.

Command line wizardry, part two: Variables and loops in Bash Learn to process thousands of items reliably and repeatably in this installment.

Programming C without variables is like, well, programming C without variables. They are so essential to the language that it doesn’t even require an analogy here. We can declare and use them… ...

Although they are not required, the initializations at the beginning of the program represent good programming practice; gawk automatically declares and initializes variables as you use them.

Want to learn how to code but don't know where to start? We've got you covered. We'll be teaching you the basics all week, and here's your first lesson. Previously we've provided you with some ...

Structures (or “structs” in C) allow you to group several related variables and treat them as one unit. They are a mechanism for extending the type system of the C language by introducing user-defined ...

The original C language was a great programming tool. Created back in the early 1970s, it remains one of the most influential computer languages more than four decades later. As a .NET developer, you ...

Of the different kinds of Windows environment variables, one that plays an important role—and impacts the way programs and commands get executed—is the PATH environment variable.