Bash prompt with default value

ask.sh

# Description:
# A simple prompt for bash that supports a default value.
# ${ask} QUESTION DEFAULT
#
# Example:
# BRANCH=$(ask "Which Branch?" "master")
function ask(){
    local QUESTION=$1
    local DEFAULT=$2
    local ANSWER

    read -p "${QUESTION} [${DEFAULT}] " ANSWER
    [ -z "${ANSWER}" ] && ANSWER=$DEFAULT

    echo $ANSWER
}