Switch statement in Go - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is a switch statement in Go?

A switch statement in Go lets you choose between many options based on the value of an expression. It is like asking multiple questions and picking the answer that matches.

beginner

How do you write a basic switch statement in Go?

Use the keyword switch followed by a value. Then write case for each option and default for when no case matches. Example:<br>

switch x {
case 1:
  // do something
case 2:
  // do something else
default:
  // fallback
}

beginner

What happens if no case matches and there is no default in a Go switch?

The switch does nothing and the program continues after the switch block. No code inside the switch runs.

intermediate

Can a Go switch statement have multiple values in one case?

Yes! You can list multiple values separated by commas in one case. For example:<br>

switch day {
case "Saturday", "Sunday":
  fmt.Println("Weekend")
default:
  fmt.Println("Weekday")
}

intermediate

How does Go switch differ from if-else chains?

Go switch is cleaner and easier to read when checking one value against many options. It also stops checking after the first match without needing breaks, unlike some other languages.

What keyword starts a switch statement in Go?

A switch

B case

C select

D if

The switch statement always starts with the keyword switch.

What happens if no case matches and there is no default case?

A The switch block is skipped

B An error is shown

C The first case runs anyway

D The program crashes

If no case matches and no default is given, the switch block does nothing and the program continues.

How do you write multiple values in one case?

A Write multiple case statements

B Use the OR operator (||)

C Use semicolons between values

D Separate values with commas

In Go, you list multiple values separated by commas in a single case.

Does Go switch require break statements to stop after a case?

A Only if you want to skip cases

B Yes, always

C No, it stops automatically

D Only in default case

Go switch stops after the first matching case automatically, so no break is needed.

Which of these is a valid switch statement header in Go?

A switch x then {

B switch x {

C switch (x) {

D switch on x {

The correct syntax is switch x { without parentheses or extra words.

Explain how a switch statement works in Go and how it differs from if-else.

Think about how Go picks one matching case and stops.

Write a simple Go switch statement that prints "Weekend" for Saturday and Sunday, and "Weekday" for other days.

Use commas to list Saturday and Sunday in one case.