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Co-authored-by: Sebastiaan Speck <12570668+sebastiaanspeck@users.noreply.github.com> Co-authored-by: Wiktor Perskawiec <git@spageektti.cc> Co-authored-by: Lena <126529524+acuteenvy@users.noreply.github.com>
24 lines
468 B
Markdown
24 lines
468 B
Markdown
# Dollar sign
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> Expand a bash variable.
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> More information: <https://gnu.org/software/bash/manual/bash.html#Shell-Variables>.
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- Print a variable:
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`echo ${{VARIABLE}}`
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- Print the exit status of the previous command:
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`echo $?`
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- Print a random number between 0 and 32767:
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`echo $RANDOM`
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- Print one of the prompt strings:
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`echo ${{PS1|PS2|PS3|PS4}}`
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- Expand with the output of `command` and run it. Same as enclosing `command` in backtics:
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`$({{command}})`
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