Name
let
Synopsis
let
expressions
Perform arithmetic as specified by one or more integer expressions. expressions consist of numbers, operators, and shell variables (which don’t need a preceding $), and must be quoted if they contain spaces or other special characters. For more information and examples, see Section 7.4 earlier in this chapter. See also expr in Chapter 3.
Examples
Both of the following examples add 1 to variable i:
let i=i+1
let "i = i + 1"
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