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Fix -v example #174

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Jan 21, 2025
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Fix -v example #174

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4 changes: 3 additions & 1 deletion ebook/en/content/009-bash-conditional-expressions.md
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Expand Up @@ -85,9 +85,11 @@ Here is a list of the most popular Bash conditional expressions. You do not have
* True if the shell variable varname is set (has been assigned a value).

```bash
[[ -v ${varname} ]]
[[ -v varname ]]
```

> Here, `varname` is the name of the variable. The `-v` operator expects a variable name as an argument rather than a value, so if you pass `${varname}` instead of `varname`, the expression will return false.

True if the length of the string is zero.

```bash
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