How to Increment and Decrement Variable in Bash

Posted by linuxize on Aug 12, 2019 2:47 AM EDT
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One of the most common arithmetic operations when writing Bash scripts is incrementing and decrementing variables. This is most often used in loops as a counter, but it can occur elsewhere in the script as well. Incrementing and Decrementing means adding or subtracting a value (usually 1), respectively, from the value of a numeric variable. In Bash, there are multiple ways to increment/decrement a variable. This article explains some of them.

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