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Merge pull request Snailclimb#220 from illusorycloud/patch-8
Update Shell.md
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操作系统/Shell.md

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@@ -210,7 +210,7 @@ expr length "$name";
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expr 5+6 // 直接输出 5+6
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expr 5 + 6 // 输出 11
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```
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对于某些运算符,还需要我们使用符号"\"进行转义,否则就会提示语法错误。
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对于某些运算符,还需要我们使用符号`\`进行转义,否则就会提示语法错误。
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```shell
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expr 5 * 6 // 输出错误

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