Zip and password protect files on a mac or window machines

Why is it so difficult to find a way to do this on a Mac? This is a machine agnostic method of doing it.

// at location of file
“zip -er CreatingFolderName.zip TheFilesOrFoldersBeingZipped/.”
// you will twice be prompted for a password to protect it with

It’s that simple. Finding out how to do it is not.