Continue statement in Go - Practice Problems & Coding Challenges

Challenge - 5 Problems

❓ Predict Output

intermediate

Output of loop with continue skipping even numbers

What is the output of this Go program?

Go

package main
import "fmt"
func main() {
    for i := 1; i <= 5; i++ {
        if i%2 == 0 {
            continue
        }
        fmt.Print(i, " ")
    }
}

A 1 3 5

B 2 4

C 1 2 3 4 5

D 1 3 4 5

💡 Hint

The continue statement skips the rest of the loop body for even numbers.

The loop prints numbers from 1 to 5. When the number is even, continue skips printing it. So only odd numbers 1, 3, and 5 are printed.

❓ Predict Output

intermediate

Continue statement inside nested loops

What will this Go program print?

Go

package main
import "fmt"
func main() {
    for i := 1; i <= 2; i++ {
        for j := 1; j <= 3; j++ {
            if j == 2 {
                continue
            }
            fmt.Printf("%d%d ", i, j)
        }
    }
}

A 11 21 31

B 11 13 21 23

C 12 22

D 11 12 13 21 22 23

💡 Hint

Continue skips printing when j equals 2, but only for the inner loop.

The inner loop skips printing when j == 2, so it prints j=1 and j=3 for each i. So output is 11 13 21 23.

❓ Predict Output

advanced

Effect of continue in a range loop over a slice

What is the output of this Go program?

Go

package main
import "fmt"
func main() {
    nums := []int{1, 2, 3, 4, 5}
    sum := 0
    for _, n := range nums {
        if n%2 == 0 {
            continue
        }
        sum += n
    }
    fmt.Println(sum)
}

A 9

B 10

C 15

D 7

💡 Hint

Only odd numbers are added to sum because continue skips even numbers.

The loop adds only odd numbers: 1 + 3 + 5 = 9. Even numbers are skipped by continue.

❓ Predict Output

advanced

Continue statement with label in nested loops

What will this Go program print?

Go

package main
import "fmt"
func main() {
Outer:
    for i := 1; i <= 3; i++ {
        for j := 1; j <= 3; j++ {
            if j == 2 {
                continue Outer
            }
            fmt.Printf("%d%d ", i, j)
        }
    }
}

A 11 31

B 11 12 13 21 22 23 31 32 33

C 11 13 21 23 31 33

D 11 21 31

💡 Hint

Continue with label skips to next iteration of the outer loop when j == 2.

When j == 2, continue Outer skips the rest of inner and outer loop body and moves to next i. So only j=1 prints for each i: 11 21 31.

🧠 Conceptual

expert

Why use continue statement in Go loops?

Which of the following best explains the purpose of the continue statement in Go loops?

A It pauses the loop execution until a condition is met.

B It immediately exits the entire loop and continues execution after the loop.

C It skips the remaining statements in the current iteration and moves to the next iteration of the loop.

D It restarts the loop from the first iteration regardless of the current position.

💡 Hint

Think about what happens when you want to skip some work but keep looping.

The continue statement skips the rest of the current loop iteration and proceeds with the next iteration. It does not exit the loop or restart it.

Practice

1. What does the continue statement do inside a loop in Go?

easy

A. Skips the rest of the current loop iteration and moves to the next iteration

B. Stops the entire loop immediately

C. Exits the current function

D. Repeats the current iteration without moving forward

Solution

1. Step 1: Understand the role of continue in loops

   The continue statement tells the loop to skip the remaining code in the current iteration.

2. Step 2: Identify what happens after continue

   After skipping, the loop moves on to the next iteration without stopping the whole loop.

3. Final Answer:

   Skips the rest of the current loop iteration and moves to the next iteration -> Option A

4. Quick Check:

   continue skips current step [OK]

Hint: Remember: continue skips current step, not whole loop [OK]

Common Mistakes:

• Confusing continue with break
• Thinking continue exits the function
• Assuming continue repeats the iteration

2. Which of the following is the correct syntax to use continue inside a for loop in Go?

easy

A. continue

B. continue {}

C. continue()

D. continue;

Solution

1. Step 1: Recall Go syntax for statements

   In Go, continue is a keyword used alone without parentheses or semicolons.

2. Step 2: Identify the correct form

   The correct usage is simply continue by itself inside the loop.

3. Final Answer:

   continue -> Option A

4. Quick Check:

   Go statements like continue have no parentheses or semicolons [OK]

Hint: Use continue alone, no parentheses or semicolon needed [OK]

Common Mistakes:

• Adding semicolon after continue
• Using continue as a function with parentheses
• Using braces {} after continue

3. What will be the output of the following Go code?

for i := 1; i <= 5; i++ {
    if i == 3 {
        continue
    }
    fmt.Print(i, " ")
}

medium

A. 1 2 3 4 5

B. 1 2

C. 3 4 5

D. 1 2 4 5

Solution

1. Step 1: Analyze the loop and condition

   The loop runs from 1 to 5. When i equals 3, continue skips printing 3.

2. Step 2: Determine printed values

   Values 1, 2, 4, and 5 are printed with spaces. Number 3 is skipped.

3. Final Answer:

   1 2 4 5 -> Option D

4. Quick Check:

   continue skips printing 3 [OK]

Hint: Skip printing when continue hits condition [OK]

Common Mistakes:

• Including 3 in output
• Stopping loop instead of skipping
• Printing nothing due to misunderstanding continue

4. Identify the error in this Go code snippet using continue:

for i := 0; i < 5; i++ {
    if i == 2 {
        continue()
    }
    fmt.Println(i)
}

medium

A. The loop condition is incorrect

B. fmt.Println is used incorrectly

C. Using parentheses with continue causes a syntax error

D. continue should be replaced with break

Solution

1. Step 1: Check the usage of continue

   In Go, continue is a statement without parentheses. Using continue() causes a syntax error.

2. Step 2: Verify other parts

   The loop condition and fmt.Println usage are correct. The error is only in the continue syntax.

3. Final Answer:

   Using parentheses with continue causes a syntax error -> Option C

4. Quick Check:

   continue has no parentheses in Go [OK]

Hint: Don't add parentheses after continue [OK]

Common Mistakes:

• Writing continue() instead of continue
• Confusing continue with break
• Misreading loop condition as error

5. You want to print all numbers from 1 to 10 except multiples of 3 using a for loop and continue. Which code snippet correctly achieves this?

hard

A. for i := 1; i <= 10; i++ {
if i % 3 != 0 {
continue
}
fmt.Println(i)
}

B. for i := 1; i <= 10; i++ {
if i % 3 == 0 {
continue
}
fmt.Println(i)
}

C. for i := 1; i <= 10; i++ {
if i % 3 == 0 {
break
}
fmt.Println(i)
}

D. for i := 1; i <= 10; i++ {
if i % 3 == 0 {
fmt.Println(i)
continue
}
}

Solution

1. Step 1: Understand the goal

   We want to skip printing numbers divisible by 3 and print all others from 1 to 10.

2. Step 2: Analyze each option

   for i := 1; i <= 10; i++ { if i % 3 == 0 { continue } fmt.Println(i) } skips printing multiples of 3 using continue correctly. for i := 1; i <= 10; i++ { if i % 3 != 0 { continue } fmt.Println(i) } skips non-multiples, printing only multiples. for i := 1; i <= 10; i++ { if i % 3 == 0 { break } fmt.Println(i) } breaks the loop early. for i := 1; i <= 10; i++ { if i % 3 == 0 { fmt.Println(i) continue } } prints multiples and skips others incorrectly.

3. Final Answer:

   for i := 1; i <= 10; i++ { if i % 3 == 0 { continue } fmt.Println(i) } -> Option B

4. Quick Check:

   continue skips multiples of 3, print others [OK]

Hint: Use if condition with continue to skip unwanted values [OK]

Common Mistakes:

• Using break instead of continue
• Reversing the condition logic
• Printing inside the continue block