Evaluate expression.

      let expression [expression]

Each expression is an arithmetic expression to be evaluated. If the last expression evaluates to 0, let returns 1; otherwise 0 is returned.

let is very similar to (( - the only difference being let is a builtin (simple command), and (( is a compound command.

The arguments to let are therefore subject to all the same expansions and substitutions as any other simple command - requiring proper quoting and escaping - whereas the contents of (( aren't subject to word-splitting or pathname expansion (almost never desirable for arithmetic). For this reason, the arithmetic compound command should generally be preferred over let.

let is a bash builtin command.

"Arithmetic is being able to count up to twenty without taking off your shoes" ~ Mickey Mouse

Related macOS commands

expr - Evaluate expressions.

Copyright © 1999-2024 SS64.com
Some rights reserved