Chapter 4. Introduction to Variables and Parameters
Table of Contents
目錄
4.1. Variable Substitution
變數替換
4.2. Variable Assignment
變數指派
4.3. Bash Variables Are Untyped
Bash 變數是沒有特定類型的
4.4. Special Variable Types
特殊變數類型
Variables are how programming and scripting languages represent data.
變數就是程式與腳本語言的「資料」。
A variable is nothing more than a label, a name assigned to a location or set of locations in computer memory holding an item of data.
變數就像標籤一樣，標籤名稱指向一個或一組在電腦記憶體中特定位置。
Variables appear in arithmetic operations and manipulation of quantities, and in string parsing.
變數通常會出現在做數學運算及做字串處理時