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Variables are ways of storing values at one point in your program for
use later in another part of your program. They can be manipulated
entirely within the program text, and they can also be assigned values
awk command line.
6.3.1 Using Variables in a Program Using variables in your programs. 6.3.2 Assigning Variables on the Command Line Setting variables on the command-line and a summary of command-line syntax. This is an advanced method of input.
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