Simple types: Summary

You’ve made it to the end of the first part of this series, so let’s summarize.

1. You make variables using var and constants using let. It’s preferable to use constants as often as possible.
2. Strings start and end with double quotes, but if you want them to run across multiple lines you should use three sets of double quotes.
3. Integers hold whole numbers, doubles hold fractional numbers, and booleans hold true or false.
4. String interpolation allows you to create strings from other variables and constants, placing their values inside your string.
5. Swift uses type inference to assign each variable or constant a type, but you can provide explicit types if you want.