Operators and conditions summary

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

1. Swift has operators for doing arithmetic and for comparison; they mostly work like you already know.
2. There are compound variants of arithmetic operators that modify their variables in place: +=, -=, and so on.
3. You can use if, else, and else if to run code based on the result of a condition.
4. Swift has a ternary operator that combines a check with true and false code blocks. Although you might see it in other code, I wouldn’t recommend using it yourself.
5. If you have multiple conditions using the same value, it’s often clearer to use switch instead.
6. You can make ranges using ..< and ... depending on whether the last number should be excluded or included.