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23 lines
519 B
Bash
23 lines
519 B
Bash
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#!/usr/bin/env bash
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################### 声明变量 ###################
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name="world"
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echo "hello ${name}"
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# Output: hello world
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################### 只读变量 ###################
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readonly_var="hello"
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echo ${readonly_var}
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# Output: hello
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readonly readonly_var
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# rword="bye" # 如果放开注释，执行时会报错
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################### 删除变量 ###################
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dword="hello" # 声明变量
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echo ${dword} # 输出变量值
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# Output: hello
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unset dword # 删除变量
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echo ${dword}
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# Output: （空）
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