mirror of
https://github.com/dunwu/linux-tutorial.git
synced 2024-04-15 19:55:24 +08:00
23 lines
514 B
Bash
23 lines
514 B
Bash
#!/usr/bin/env bash
|
|
|
|
################### 声明变量 ###################
|
|
name="world"
|
|
echo "hello ${name}"
|
|
# Output: hello world
|
|
|
|
################### 只读变量 ###################
|
|
readonly_var="hello"
|
|
echo ${readonly_var}
|
|
# Output: hello
|
|
readonly readonly_var
|
|
# rword="bye" # 如果放开注释,执行时会报错
|
|
|
|
################### 删除变量 ###################
|
|
dword="hello" # 声明变量
|
|
echo ${dword} # 输出变量值
|
|
# Output: hello
|
|
|
|
unset dword # 删除变量
|
|
echo ${dword}
|
|
# Output: (空)
|