title: What does the underscore mean before a variable in Swiftui in an init()?
body: <p>What does the underscore mean before momentDate?  Why is it needed?</p>
  <p><a href="https://i.stack.imgur.com/IX4Ql.png" rel="noreferrer"><img src="https://i.stack.imgur.com/IX4Ql.png" alt="enter image description here" /></a></p>