Continue statement behavior in C Sharp (C#) - Cheat Sheet & Quick Revision

Recall & Review

beginner

What does the continue statement do inside a loop in C#?

The continue statement skips the rest of the current loop iteration and moves control to the next iteration of the loop.

beginner

In which types of loops can you use the continue statement in C#?

You can use continue in for, while, and do-while loops in C#.

intermediate

What happens if continue is used inside a nested loop?

The continue statement affects only the innermost loop where it is used, skipping to the next iteration of that loop.

beginner

Can continue be used outside of loops in C#?

No, continue can only be used inside loops. Using it outside will cause a compile-time error.

beginner

How does continue differ from break in loops?

continue skips the rest of the current iteration and moves to the next one, while break exits the entire loop immediately.

What does the continue statement do in a for loop?

A Restarts the entire loop from the beginning

B Exits the loop completely

C Pauses the loop until a condition is met

D Skips the rest of the current iteration and starts the next iteration

continue skips the remaining code in the current iteration and moves to the next iteration of the loop.

Where can the continue statement NOT be used?

A Outside any loop

B Inside a <code>do-while</code> loop

C Inside a <code>for</code> loop

D Inside a <code>while</code> loop

continue can only be used inside loops. Using it outside causes a compile error.

In nested loops, which loop does continue affect?

A The outermost loop

B All loops simultaneously

C The innermost loop where <code>continue</code> is used

D None of the loops

continue affects only the innermost loop it is inside, skipping to its next iteration.

What is the difference between continue and break?

A <code>continue</code> exits the loop; <code>break</code> skips to next iteration

B <code>continue</code> skips to next iteration; <code>break</code> exits the loop

C Both do the same thing

D Neither affects loop execution

continue skips the rest of the current iteration, break exits the loop entirely.

What happens if continue is used in a do-while loop?

A It skips to the next iteration after checking the condition

B It exits the loop immediately

C It causes a syntax error

D It restarts the loop from the beginning

In a do-while loop, continue skips to the condition check and then starts the next iteration if true.

Explain how the continue statement changes the flow inside a loop.

Think about what happens after <code>continue</code> is executed inside a loop.

Describe the difference between continue and break statements in loops.

One stops the loop, the other skips part of it.

Practice

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

easy

A. Stops the entire loop immediately

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

C. Exits the current method

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 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 one -> Option B

4. Quick Check:

   continue skips current iteration [OK]

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

Common Mistakes:

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

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

easy

A. continue;

B. continue()

C. continue {}

D. continue[]

Solution

1. Step 1: Recall the syntax of continue

   In C#, continue is a statement and must be followed by a semicolon.

2. Step 2: Check each option

   Only continue; is valid syntax. The others use parentheses, braces, or brackets incorrectly.

3. Final Answer:

   continue; -> Option A

4. Quick Check:

   Correct syntax ends with semicolon [OK]

Hint: Use semicolon after continue, no parentheses [OK]

Common Mistakes:

• Adding parentheses after continue
• Using braces or brackets with continue
• Omitting the semicolon

3. What will be the output of the following C# code?

for (int i = 1; i <= 5; i++) {
  if (i == 3) continue;
  Console.Write(i + " ");
}

medium

A. 2 3 4 5

B. 1 2 3 4 5

C. 1 2 3 4

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.

2. Step 2: Determine printed values

   Numbers 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 triggers, others print [OK]

Common Mistakes:

• Including the skipped number in output
• Confusing continue with break
• Ignoring spaces in output

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

int i = 0;
while (i < 3) {
  if (i == 1)
    continue;
  Console.Write(i);
  i++;
}

medium

A. Syntax error: continue cannot be used in while loop

B. Missing semicolon after continue

C. Infinite loop because i++ is skipped when i == 1

D. Console.Write should be Console.WriteLine

Solution

1. Step 1: Understand loop behavior with continue

   When i == 1, continue skips i++, so i stays 1 forever.

2. Step 2: Identify the problem caused

   The loop never increments i past 1, causing an infinite loop.

3. Final Answer:

   Infinite loop because i++ is skipped when i == 1 -> Option C

4. Quick Check:

   continue skips i++ causing infinite loop [OK]

Hint: Ensure increments run before continue to avoid infinite loops [OK]

Common Mistakes:

• Thinking continue causes syntax error
• Ignoring loop variable increment
• Assuming Console.WriteLine fixes logic

5. You want to print all even numbers from 1 to 10 but skip printing 6 using a for loop and continue. Which code snippet correctly does this?

hard

A. for (int i = 2; i <= 10; i += 2) { if (i == 6) continue; Console.Write(i + " "); }

B. for (int i = 1; i <= 10; i++) { if (i % 2 == 0 && i != 6) Console.Write(i + " "); }

C. for (int i = 2; i <= 10; i++) { if (i % 2 == 0) Console.Write(i + " "); if (i == 6) continue; }

D. for (int i = 2; i <= 10; i += 2) { if (i == 6) break; Console.Write(i + " "); }

Solution

1. Step 1: Understand the goal

   Print even numbers 2,4,8,10 but skip 6 using continue inside a for loop.

2. Step 2: Check each option

   for (int i = 2; i <= 10; i += 2) { if (i == 6) continue; Console.Write(i + " "); } loops by 2, skips 6 with continue, prints others. for (int i = 1; i <= 10; i++) { if (i % 2 == 0 && i != 6) Console.Write(i + " "); } prints all evens except 6 but no continue used. for (int i = 2; i <= 10; i++) { if (i % 2 == 0) Console.Write(i + " "); if (i == 6) continue; } prints 6 because print happens before continue. for (int i = 2; i <= 10; i += 2) { if (i == 6) break; Console.Write(i + " "); } breaks at 6, stopping loop early, so 8 and 10 not printed.

3. Final Answer:

   for (int i = 2; i <= 10; i += 2) { if (i == 6) continue; Console.Write(i + " "); } -> Option A

4. Quick Check:

   Use continue to skip 6 in even-step loop [OK]

Hint: Loop evens, continue at 6 to skip it, print others [OK]

Common Mistakes:

• Using break instead of continue
• Not incrementing by 2 for evens
• Skipping continue and using if only