Switch with compound cases in Swift - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is a compound case in a Swift switch statement?

A compound case lets you group multiple values together in one case using commas, so the same code runs for any of those values.

beginner

How do you write multiple values in one case in Swift's switch?

You list the values separated by commas after the case keyword, like case 1, 2, 3:.

beginner

Why use compound cases in a switch statement?

It makes your code shorter and clearer by handling several values with the same code instead of repeating cases.

intermediate

Can you use ranges or conditions with compound cases in Swift?

Yes, you can combine compound cases with ranges or use where clauses for extra conditions.

beginner

Example: What does this Swift code print?<br><pre>let number = 3
switch number {
 case 1, 3, 5:
  print("Odd number")
 case 2, 4, 6:
  print("Even number")
 default:
  print("Unknown")
}</pre>

It prints Odd number because 3 matches the first compound case with 1, 3, and 5.

In Swift, how do you group multiple values in one switch case?

A Separate values with commas after case

B Use semicolons between values

C Write multiple case lines for each value

D Use parentheses around values

You separate multiple values with commas in one case, like case 1, 2, 3:.

What happens if a value matches a compound case in Swift switch?

A It runs all cases

B The switch skips that case

C The code inside that case runs

D The program crashes

When a value matches any value in a compound case, the code inside that case executes.

Can you mix ranges and compound cases in Swift switch?

A Yes, you can combine them

B No, ranges and compound cases are exclusive

C Only if you use if-else inside switch

D Only with default case

Swift allows combining ranges and compound cases, and you can add conditions with where clauses.

Which keyword lets you add extra conditions to a Swift switch case?

A else

B if

C case

D where

The where keyword adds extra conditions to a case in Swift switch.

What is the benefit of using compound cases in Swift switch?

A Slower program execution

B Shorter and clearer code

C More lines of code

D Avoids using default case

Compound cases help write shorter and clearer code by grouping multiple values in one case.

Explain how to use compound cases in a Swift switch statement and why they are useful.

Think about how you can handle several options together without repeating code.

Write a Swift switch statement using compound cases to print "Weekend" for Saturday and Sunday, and "Weekday" for other days.

Use compound cases to group weekend days together.