bash check if variable is a number
# bash check if $1 is an integer
# compact version:
[ -n "$1" ] && echo "\$1 : is EMPTY" && exit 1
[ "$1" -eq "$1" ] 2>/dev/null && echo "$1 : is a number" || echo "$1 : not a number"
# long version
if [ "$1" -eq "$1" ] 2>/dev/null; then
echo "$1 : is a number"
else
[ -n "$1" ] && echo "$1 : is EMPTY" && exit 1
echo "$1 : not a number"
ficheck if variable is a number in bash
re='^[0-9]+$'
if ! [[ $yournumber =~ $re ]] ; then
echo "error: Not a number" >&2; exit 1
fibash if is number
re='^[0-9]+$'
if ! [[ $yournumber =~ $re ]] ; then
echo "error: Not a number" >&2; exit 1
fiCopyright © 2021 Codeinu
Forgot your account's password or having trouble logging into your Account? Don't worry, we'll help you to get back your account. Enter your email address and we'll send you a recovery link to reset your password. If you are experiencing problems resetting your password contact us
