Using awk Features

So far you have learned about the basics of using awk, now you will look at some of its more powerful features:

  • Variables

  • Flow control

  • Loops

Variables

Variables in awk are similar to variables in the shell; they are words that hold a value. The basic syntax of defining a variable is

							name=value
						

Here name is the name of the variable and value is the value of that variable. For example, the following awk command

fruit="peach"

creates the variable fruit and assigns it the value peach. There is no need to initialize a variable; the first time you use it, it is automatically initialized.

Like the shell, the name of a variable can contain only letters, numbers, and underscores. A variable's name cannot start with a number.

You can ...

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