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Fix some typos #4

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Snowball-Wang wants to merge 2 commits into from
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Fix some typos #4

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ee6bda7
Fix some typos
Snowball-Wang Apr 8, 2020
da4239b
Merge branch 'master' into fix-some-typos
Snowball-Wang Apr 8, 2020
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2 changes: 1 addition & 1 deletion docs/array.md
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Expand Up @@ -263,7 +263,7 @@ $ echo ${#a[100]}
$ arr=([5]=a [9]=b [23]=c)
$ echo ${!arr[@]}
5 9 23
$ echo ${!arr[@*]}
$ echo ${!arr[*]}
5 9 23
```

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2 changes: 2 additions & 0 deletions docs/variable.md
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Expand Up @@ -381,6 +381,7 @@ $ echo $result
60
```


上面例子中，如果变量`result`不声明为整数，`val1*val2`会被当作字面量，不会进行整数运算。另外，`val1`和`val2`其实不需要声明为整数，因为只要`resule`声明为整数，它的赋值就会自动解释为整数运算。

注意，一个变量声明为整数以后，依然可以被改写为字符串。
Expand All @@ -394,6 +395,7 @@ foo

上面例子中，变量`foo`声明为整数，但是覆盖以后，就变成了字符串，Bash 不会报错。


**（2）`-x`参数**

`-x`参数等同于`export`命令，可以输出一个变量为子 Shell 的环境变量。
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