Difference between revisions of "$1"
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https://stackoverflow.com/questions/3601515/how-to-check-if-a-variable-is-set-in-bash | https://stackoverflow.com/questions/3601515/how-to-check-if-a-variable-is-set-in-bash | ||
| − | [[if]] [ -n "$1" ]; then | + | [[if]] [ [[-n]] "$1" ]; then |
echo "You supplied the first parameter!" | echo "You supplied the first parameter!" | ||
else | else | ||
Revision as of 10:59, 3 November 2021
https://stackoverflow.com/questions/3601515/how-to-check-if-a-variable-is-set-in-bash
if [ -n "$1" ]; then echo "You supplied the first parameter!" else echo "First parameter not supplied." fi
See also
Bash [ -c ],alias,&&, Bash history, Autocompletion,set,unset,export,.bash_aliases, .bashrc and .bash profile,PS1,echo,brace expansion, Function,shopt,trap,set -e,source,PATH,complete,disown,.hushlogin,.bashrc,builtin,eval,set,$PATH,$HOME,TZ,.profile,-e, -i,Builtin (Bash),mapfile,~, return (Bash), for, until,declare, dirname, basename, functions.sh, Bash arithmetic expansion,shift, bash --rcfile, readonly, $1, $@
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