Break statement in C - Step-by-Step Execution

Concept Flow - Break statement

Start Loop

↓

Check Condition

Yes↓

Execute Loop Body

↓

Check Break Condition

↓

Break Loop

↓

Exit Loop

↓

End

The loop runs checking a condition each time. Inside, if the break condition is true, the loop stops immediately and exits.

Execution Sample

C

for (int i = 0; i < 5; i++) {
    if (i == 3) {
        break;
    }
    printf("%d ", i);
}

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

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
-	3	N/A	-	Exit loop	-

💡 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 (init)	1	2	3	3 (break)

Key Moments - 2 Insights

Why does the loop stop printing when i reaches 3?

Because at iteration 4 in the execution_table, the break condition i==3 is True, so the break statement stops the loop immediately.

Does the loop check the condition i<5 after break?

No, once break is executed (iteration 4), the loop exits immediately without checking i<5 again, as shown in the exit_note.

Visual Quiz - 3 Questions

Look at the execution_table, what is the output after iteration 3?

A "0 1 2 3 "

B "0 1 2 "

C "1 2 3 "

D "0 1 "

💡 Hint

Check the Output column for iteration 3 in the execution_table.

At which iteration does the break statement stop the loop?

A Iteration 2

B Iteration 3

C Iteration 4

D Iteration 5

💡 Hint

Look at the Break Condition and Action columns in the execution_table.

If the break condition was changed to i == 4, when would the loop stop?

A After printing 3

B After printing 2

C After printing 4

D It would never stop early

💡 Hint

Think about when i equals 4 and how break works from the variable_tracker.

Concept Snapshot

Break statement in C:
- Used inside loops to stop loop immediately
- Syntax: break;
- When break runs, loop exits without checking further
- Useful to stop loop early based on condition
- After break, code continues after loop

Full Transcript

This visual trace shows how the break statement works in a C for loop. The loop starts with i=0 and runs while i<5. Each iteration prints i. When i reaches 3, the break condition becomes true, so the break statement stops the loop immediately. The loop does not continue to i=4 or 5. The variable i changes from 0 to 3, then stops. The output is numbers 0 1 2 printed with spaces. Key points: break stops loop instantly, no further iterations run after break, and the loop condition is not checked again after break.