How to: display Go lang version on Bash prompt

goprompt.sh

# add this function on your .bashrc file to echoed Go version
function go_version {
    version=$(go version)
    regex="(go[0-9].[0-9].[0-9])"
    if [[ $version =~ $regex ]]; then 
         echo ${BASH_REMATCH[1]}
    fi
}

# and add to your PS1, for example
# PS1="$(go_version) $ "