title: Swift Difference Between Double and Float64
body: <p>In Swift Programing language official documentation, It says</p>
  
  <pre><code>Double represents a 64-bit floating-point number.
  Float represents a 32-bit floating-point number.
  </code></pre>
  
  <p>Link: <a href="https://docs.swift.org/swift-book/LanguageGuide/TheBasics.html#ID321" rel="noreferrer">https://docs.swift.org/swift-book/LanguageGuide/TheBasics.html#ID321</a></p>
  
  <p>Then, Why is there Float64? What is the difference between them? Or Are they same?</p>