let

Evaluate arithmetic expressions in shell. Supports variables, operators, and conditional expressions. More information: https://www.gnu.org/software/bash/manual/bash.html#index-let.

• Evaluate a simple arithmetic expression:

let "{{result = a + b}}"

• Use post-increment and assignment in an expression:

let "{{x++}}"

• Use conditional operator in an expression:

let "{{result = (x > 10) ? x : 0}}"

• Display help:

let --help