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Variable substitution changes

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Clarify documentation and give a few more examples
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Jackson Bailey 2022-05-04 15:58:25 -04:00 committed by GitHub
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README.md
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@ -135,9 +135,19 @@ $HOSTNAME current hostname
##### Variable substitution within quotes
```bash
# foo=bar
echo "'$foo'"
#'bar'
# double/single quotes around single quotes make the inner single quotes expand variables
echo $foo
# bar
echo "$foo"
# bar
# single quotes cause variables to not be expanded
echo '$foo'
# $foo
# single quotes within double quotes will not cancel expansion and will be part of the output
echo "'$foo'"
# 'bar'
# doubled single quotes act as double quotes making variables expand
echo ''$foo''
# bar
```
##### Get the length of variable
```bash