Break statement in Go - Cheat Sheet & Quick Revision

Recall & Review

beginner

What does the break statement do in Go?

The break statement immediately stops the execution of the nearest enclosing loop or switch statement and exits it.

beginner

In which Go control structures can you use the break statement?

You can use break inside for loops and switch statements to exit them early.

intermediate

What happens if you use break inside a nested loop?

The break statement only exits the innermost loop where it is used, not all outer loops.

advanced

How can you use break with labels in Go?

You can label loops and use break with the label name to exit an outer loop from inside an inner loop.

beginner

Example: What will this code print?

for i := 1; i <= 5; i++ {
  if i == 3 {
    break
  }
  fmt.Println(i)
}

It will print:<br>1<br>2<br>Because when i becomes 3, the break stops the loop immediately.

What does the break statement do inside a for loop in Go?

A Does nothing special

B Stops the loop immediately and exits it

C Restarts the loop from the beginning

D Skips the current iteration and continues

The break statement stops the loop immediately and exits it.

Can break be used to exit a switch statement in Go?

A Yes, it exits the switch

B No, it only works in loops

C Only if the switch is inside a loop

D Only with labels

In Go, break can be used to exit a switch statement early.

What happens if you use break inside an inner loop nested in an outer loop?

A Only the inner loop stops

B Both loops stop

C Only the outer loop stops

D No loops stop

The break stops only the innermost loop where it is used.

How do you break out of an outer loop from inside an inner loop in Go?

A You cannot break outer loops

B Use <code>continue</code> with a label

C Use <code>return</code>

D Use <code>break</code> with a label

You label the outer loop and use break with that label to exit it.

What will this code print?

for i := 0; i < 3; i++ {
  for j := 0; j < 3; j++ {
    if j == 1 {
      break
    }
    fmt.Print(j)
  }
  fmt.Println(i)
}

A 0 0 1 2

B 0 0 0

C 00 01 02

D 0 1 2

The inner loop prints 0 then breaks when j == 1, then the outer loop prints i. So output is 001 012.

Explain how the break statement works in Go loops and switches.

Think about how to stop a repeating action early.

Describe how to use labels with break to exit outer loops in Go.

Labels help break out of nested loops.