What is a double?
Swift version: 5.2
The Double data type is the standard Swift way of storing decimal numbers such as 3.1, 3.14159 and 16777216.333921. Whenever you create a variable or constant that holds a number like this, Swift automatically assumes it's a Double rather than a Float, because it has a higher precision and therefore less likely to lose valuable accuracy.
SPONSORED Would you describe yourself as knowledgeable, but struggling when you have to come up with your own code? Fernando Olivares has a new book containing iOS rules you can immediately apply to your coding habits to see dramatic improvements, while also teaching applied programming fundamentals seen in refactored code from published apps.
Sponsor Hacking with Swift and reach the world's largest Swift community!
Available from iOS 7.0
Similar solutions…
- How to multiply an int and a double
- How to test localization by setting a debug locale and double length pseudolanguage
- How to read tap and double-tap gestures
- How to convert a string to a double
- How to detect a double tap gesture
About the Swift Knowledge Base
This is part of the Swift Knowledge Base, a free, searchable collection of solutions for common iOS questions.
