how to install nvm in ubuntu

//STEP 1:install using curl (PPA)
sudo apt update && sudo apt install curl -y
//STEP 2:install latest version (replace 14.x with requird one(i.e 15.x))
curl -sL https://deb.nodesource.com/setup_15.x | sudo -E bash -
sudo apt install nodejs
nodejs -v
v15.3.0curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.35.3/install.sh | bash
export NVM_DIR="$([ -z "${XDG_CONFIG_HOME-}" ] && printf %s "${HOME}/.nvm" || printf %s "${XDG_CONFIG_HOME}/nvm")"
[ -s "$NVM_DIR/nvm.sh" ] && \. "$NVM_DIR/nvm.sh" # This loads nvm. Now you can use nvmcurl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.35.3/install.sh | bash$ curl -o- https://raw.githubusercontent.com/creationix/nvm/v0.33.0/install.sh | bash# Alternatively $ wget -qO- https://raw.githubusercontent.com/creationix/nvm/v0.33.11/install.sh | bash