/Shell/Bash/Bash check if variable is number

Bash check if variable is number

Bash check if variable is number

re='^[0-9]+$'
if ! [[ $yournumber =~ $re ]] ; then
   echo "error: Not a number" >&2; exit 1
fi

1

Source: stackoverflow.com

Bash if is number

re='^[0-9]+$'
if ! [[ $yournumber =~ $re ]] ; then
   echo "error: Not a number" >&2; exit 1
fi

0

Source: stackoverflow.com

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