DAY 3

Operators and conditions

---

Today we’re going to get into the real detail of Swift: operators and conditions. This can sometimes trip folks up when they are learning, because as Joseph Campbell once said, “computers are like Old Testament gods: lots of rules and no mercy.”

Don’t worry, though. Sure, if you get a condition wrong then your code might not work at first, but it costs nothing other than a little head scratching to fix it up and try again.

Today you have ten one-minute videos to watch, and you’ll meet things like operator overloading, switch statements, and more. After watching each video you’re welcome to go through the optional extra reading if you want, and as always there’s a short test to help make sure you’ve understood what was taught.

1. Arithmetic Operators
   • Optional: Why can’t Swift add a Double to an Int?
   • Optional: Why does Swift have a dedicated division remainder operator?
   • Test: Arithmetic operators
2. Operator overloading
   • Optional: Why does Swift need operator overloading?
   • Test: Operator overloading
3. Compound assignment operators
   • Optional: Why does Swift have compound assignment operators?
   • Test: Compound assignment operators
4. Comparison operators
   • Optional: How does Swift let us compare many types of data?
   • Test: Comparison operators
5. Conditions
   • Optional: What’s the difference between if and else if?
   • Test: Conditions
6. Combining conditions
   • Optional: How to check multiple conditions
   • Test: Combining conditions
7. The ternary operator
   • Optional: When should you use the ternary operator in Swift?
   • Test: The ternary operator
8. Switch statements
   • Optional: When should you use switch statements rather than if?
   • Test: Switch statements
9. Range operators
   • Optional: Why does Swift have two range operators?
   • Test: Range operators
10. Operators and conditions summary
    • Test: Operators and conditions

You’ve finished day three now, and you’re starting to write useful Swift code – make sure to tell the world about your progress!

Need help? Tweet me @twostraws!

 

Sponsor Hacking with Swift and reach the world's largest Swift community!

100 Days of Swift

---

The 100 Days of Swift is a free collection of videos, tutorials, tests, and more to help you learn Swift faster. Click here to learn more, or watch the video below.

Back to 100 Days of Swift