DAY 5

Conditions

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If there’s one line from Shakespeare’s Hamlet that most people know, it’s “to be or not to be, that is the question.” Shakespeare meant that as the ultimate question of life or death, but it just so happens that Hamlet strikes right at the heart of logic in programming: evaluating whether a condition is true or not.

Today we’re going to get into the real detail of Swift: operators and conditions, which let us evaluate our program’s state as it runs and take different action depending on the result. There are several ways of doing it and you’ll need them all, but we’ll walk through them step by step so you can see how they compare.

Today you have four tutorials to work through, where you’ll meet things like if, switch, and more. Once you’ve watched each video and optionally gone through the extra reading, there’s a short test to help make sure you’ve understood what was taught.

1. How to check a condition is true or false
   • Optional: How does Swift let us compare many types of data?
2. How to check multiple conditions
   • Optional: What’s the difference between if and else if?
   • Optional: How to check multiple conditions
   • Test: Conditions
   • Test: Combining conditions
3. How to use switch statements to check multiple conditions
   • Optional: When should you use switch statements rather than if?
   • Test: Switch statements
4. How to use the ternary conditional operator for quick tests
   • Optional: When should you use the ternary operator in Swift?
   • Test: The ternary operator

Do you remember the two rules of this series? You’re already being awesome at the first one because you keep coming back for more (you rock!), but don’t forget the second: post your progress online, so you can benefit from all the encouragement.

How can this day be improved?

Great job on finishing another day! If you still have questions about what you learned, please send them in using this form – I'll do my best to address the most common problems in the next course update. Thank you!

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