Break statement behavior in C Sharp (C#) - Practice Problems & Coding Challenges

Challenge - 5 Problems

❓ Predict Output

intermediate

Output of break in nested loops

What is the output of this C# code snippet?

C Sharp (C#)

using System;
class Program {
  static void Main() {
    for (int i = 1; i <= 3; i++) {
      for (int j = 1; j <= 3; j++) {
        if (j == 2) break;
        Console.Write(i * 10 + j + " ");
      }
    }
  }
}

A 11 21 22 31 32

B 11 12 21 22 31 32

C 11 12 13 21 22 23 31 32 33

D 11 21 31

💡 Hint

Remember that break exits only the innermost loop.

The break statement stops the inner loop when j == 2, so only j=1 prints for each i. Thus output is 11 21 31.

❓ Predict Output

intermediate

Break inside switch statement

What will this C# program print?

C Sharp (C#)

using System;
class Program {
  static void Main() {
    int x = 2;
    switch (x) {
      case 1:
        Console.Write("One");
        break;
      case 2:
        Console.Write("Two");
        break;
      default:
        Console.Write("Default");
        break;
    }
  }
}

A One

B Two

C Default

D OneTwo

💡 Hint

The break in switch stops fall-through to other cases.

Since x is 2, the case 2 block runs and prints "Two". The break prevents running other cases.

❓ Predict Output

advanced

Break effect in while loop with continue

What is the output of this C# code?

C Sharp (C#)

using System;
class Program {
  static void Main() {
    int i = 0;
    while (i < 5) {
      i++;
      if (i == 3) break;
      if (i == 2) continue;
      Console.Write(i + " ");
    }
  }
}

A 1

B 1 2

C 1 3

D 1 4

💡 Hint

Note that continue skips printing when i == 2, and break stops loop at i == 3.

i=1 prints, i=2 triggers continue (skips print), i=3 triggers break (loop ends). So output is "1 ".

🔧 Debug

advanced

Identify error with break outside loop

What error does this C# code produce?

C Sharp (C#)

using System;
class Program {
  static void Main() {
    int x = 5;
    if (x > 3) {
      break;
    }
    Console.WriteLine("Done");
  }
}

A No error, prints "Done"

B Runtime error: InvalidOperationException

C Syntax error: 'break' not inside loop or switch

D Compilation warning only

💡 Hint

Break can only be used inside loops or switch statements.

Using break outside a loop or switch causes a compile-time syntax error.

❓ Predict Output

expert

Break with labeled loops simulation

What is the output of this C# code simulating labeled break behavior?

C Sharp (C#)

using System;
class Program {
  static void Main() {
    bool exitOuter = false;
    for (int i = 1; i <= 3; i++) {
      for (int j = 1; j <= 3; j++) {
        if (i * j > 3) {
          exitOuter = true;
          break;
        }
        Console.Write(i * 10 + j + " ");
      }
      if (exitOuter) break;
    }
  }
}

A 11 12 13 21

B 11 12 13 21 22 23

C 11 12 13 21 22 23 31 32 33

D 11 12 21 22 23

💡 Hint

The inner break stops inner loop, the flag triggers break of outer loop.

The loops print until i*j > 3. When i=2,j=2 (4>3), inner break and outer break run. Output is 11 12 13 21.