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Merge pull request #33 from JacksonBailey/patch-1

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Variable substitution changes
This commit is contained in:
Bonnie I-Man Ng
2022-05-08 01:30:26 +08:00
committed by GitHub
parent 18134f72c9 dc268515b7
commit 8b2e16f0c1
1 changed files with 13 additions and 3 deletions
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README.md
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@ -135,9 +135,19 @@ $HOSTNAME current hostname
##### Variable substitution within quotes ##### Variable substitution within quotes
```bash ```bash
# foo=bar # foo=bar
echo "'$foo'" echo $foo
#'bar' # bar
# double/single quotes around single quotes make the inner single quotes expand variables echo "$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 ##### Get the length of variable
```bash ```bash