what is "code." in the terminal code example

Example 1: code in terminal

cat << EOF >> ~/.bash_profile
# Add Visual Studio Code (code)
export PATH="\$PATH:/Applications/Visual Studio Code.app/Contents/Resources/app/bin"
EOF

Example 2: adding code . in the terminal

code () { VSCODE_CWD="$PWD" open -n -b "com.microsoft.VSCode" --args $* ;}