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Michael Hienle 2018-07-20 12:25:16 +02:00 committed by GitHub
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@ -119,15 +119,15 @@ Parameter expansions
name="John"
echo ${name}
echo ${name/J/j} #=> "john" (substitution)
echo ${name:0:2} #=> "jo" (slicing)
echo ${name::2} #=> "jo" (slicing)
echo ${name:0:2} #=> "Jo" (slicing)
echo ${name::2} #=> "Jo" (slicing)
echo ${name::-1} #=> "Joh" (slicing)
echo ${food:-Cake} #=> $food or "Cake"
```
```bash
length=2
echo ${name:0:length} #=> "jo"
echo ${name:0:length} #=> "Jo"
```
See: [Parameter expansion](http://wiki.bash-hackers.org/syntax/pe)