Break statement in C++ - Step-by-Step Execution

Concept Flow - Break statement

Start Loop

↓

Check Condition

Yes↓

Execute Loop Body

↓

Is break condition met?

Yes→Exit Loop

No↓

Continue Loop

↩Back to Check Condition

The loop starts and checks its condition. Inside the loop, if the break condition is met, the loop stops immediately. Otherwise, it continues looping.

Execution Sample

C++

for (int i = 0; i < 5; i++) {
    if (i == 3) {
        break;
    }
    std::cout << i << " ";
}

This code prints numbers from 0 up to 2, then stops the loop when i equals 3.

Execution Table

Iteration	i	Condition (i < 5)	Break Condition (i == 3)	Action	Output
1	0	True	False	Print 0	0
2	1	True	False	Print 1	1
3	2	True	False	Print 2	2
4	3	True	True	Break loop
5	-	Loop exited	-	-	-

💡 Loop exits at iteration 4 because break condition i == 3 is True

Variable Tracker

Variable	Start	After 1	After 2	After 3	Final
i	0	1	2	3	3

Key Moments - 2 Insights

Why does the loop stop printing numbers after 2 even though the loop condition allows i < 5?

Because at iteration 4 when i equals 3, the break condition is True, so the loop stops immediately as shown in execution_table row 4.

Does the break statement skip the current iteration or stop the entire loop?

The break statement stops the entire loop immediately, not just skipping the current iteration, as seen in execution_table row 4 where the loop exits.

Visual Quiz - 3 Questions

Look at the execution table, what is the value of i when the break statement is executed?

A 3

B 2

C 4

D 5

💡 Hint

Check the 'Break Condition' and 'i' columns in execution_table row 4.

At which iteration does the loop stop running according to the execution table?

A Iteration 5

B Iteration 3

C Iteration 4

D Iteration 6

💡 Hint

Look at the 'Action' column where the break occurs in execution_table row 4.

If the break condition was changed to (i == 2), what would be the last number printed?

A 2

B 1

C 3

D 4

💡 Hint

Refer to variable_tracker and execution_table logic for when break triggers.

Concept Snapshot

Break statement in C++:
- Used inside loops to stop the loop immediately.
- Syntax: if (condition) break;
- When break runs, loop exits regardless of loop condition.
- Useful to stop loops early based on a condition.
- After break, code continues after the loop.

Full Transcript

This example shows a for loop counting from 0 to 4. Inside the loop, there is a check if i equals 3. When i is 3, the break statement runs, which stops the loop immediately. Before that, the loop prints the values 0, 1, and 2. The execution table shows each iteration, the value of i, whether the loop condition and break condition are true, the action taken, and the output. The variable tracker shows how i changes each iteration. Key moments explain why the loop stops early and how break works. The quiz questions test understanding of when break triggers and how it affects output.