Break vs continue execution difference in Python - Hands-On Comparison

Break vs Continue Execution Difference

📖 Scenario: Imagine you are checking a list of daily temperatures to find if there is a very hot day or to skip cold days while counting warm days.

🎯 Goal: You will write Python code to see how break and continue change the flow inside a loop.

📋 What You'll Learn

Create a list called temperatures with exact values: 22, 25, 30, 35, 28, 40, 20

Create a variable called hot_day_found and set it to False

Use a for loop with variable temp to go through temperatures

Inside the loop, use break to stop when temperature is 35 or more

Create a variable called warm_days_count and set it to 0

Use a for loop with variable temp to go through temperatures

Inside the loop, use continue to skip temperatures less than 25

Increase warm_days_count by 1 for each warm day

Print the values of hot_day_found and warm_days_count

💡 Why This Matters

🌍 Real World

In real life, you might want to stop checking data once you find a critical value or skip irrelevant data points.

💼 Career

Understanding <code>break</code> and <code>continue</code> helps in writing efficient loops in data processing, automation, and many programming tasks.

1

Create the temperature list

Create a list called temperatures with these exact values: 22, 25, 30, 35, 28, 40, 20

Python

# Create the temperatures list
# Your code here

Hint

Use square brackets [] to create a list and separate numbers with commas.

2

Set up a variable to find a hot day

Create a variable called hot_day_found and set it to False

Python

temperatures = [22, 25, 30, 35, 28, 40, 20]
# Create hot_day_found variable and set to False
# Your code here

Hint

Use = to assign False to the variable.

3

Use break to stop when a hot day is found

Use a for loop with variable temp to go through temperatures. Inside the loop, if temp is 35 or more, set hot_day_found to True and use break to stop the loop.

Python

temperatures = [22, 25, 30, 35, 28, 40, 20]
hot_day_found = False
# Use a for loop and break when temp >= 35
# Your code here

Hint

Use for temp in temperatures: to loop. Use if to check temperature. Use break to stop the loop.

4

Count warm days using continue and print results

Create a variable called warm_days_count and set it to 0. Use a for loop with variable temp to go through temperatures. Inside the loop, use continue to skip temperatures less than 25. Increase warm_days_count by 1 for each warm day. Finally, print hot_day_found and warm_days_count.

Python

temperatures = [22, 25, 30, 35, 28, 40, 20]
hot_day_found = False
for temp in temperatures:
    if temp >= 35:
        hot_day_found = True
        break

# Count warm days using continue and print results
# Your code here

Hint

Use continue to skip cold days. Increase count for warm days. Use print() to show results.

Practice

1. What does the break statement do inside a loop in Python?

easy

A. Stops the entire loop immediately

B. Skips the current iteration and continues with the next

C. Ends the current function

D. Restarts the loop from the beginning

Solution

1. Step 1: Understand the role of break

   The break statement is used to exit a loop completely when a condition is met.

2. Step 2: Compare with other options

   Unlike continue, which skips one iteration, break stops the loop entirely.

3. Final Answer:

   Stops the entire loop immediately -> Option A

4. Quick Check:

   break = stop loop [OK]

Hint: Break stops loop; continue skips iteration [OK]

Common Mistakes:

• Confusing break with continue
• Thinking break skips only one iteration
• Assuming break restarts the loop

2. Which of the following is the correct syntax to skip the current iteration in a loop?

easy

A. skip

B. break

C. continue

D. stop

Solution

1. Step 1: Identify the keyword to skip iteration

   The keyword continue is used to skip the current iteration and move to the next one.

2. Step 2: Check other options for correctness

   break stops the loop, while skip and stop are not valid Python keywords.

3. Final Answer:

   continue -> Option C

4. Quick Check:

   continue skips iteration [OK]

Hint: Use continue to skip iteration, break to stop loop [OK]

Common Mistakes:

• Using break instead of continue
• Using non-existent keywords like skip
• Confusing syntax for loop control

3. What is the output of the following code?

for i in range(5):
    if i == 3:
        break
    print(i)

medium

A. 0 1 2 3

B. 0 1 2 3 4

C. 3 4

D. 0 1 2

Solution

1. Step 1: Analyze the loop and break condition

   The loop runs from 0 to 4. When i == 3, the break stops the loop immediately.

2. Step 2: Determine printed values before break

   Values 0, 1, and 2 are printed. When i reaches 3, loop stops before printing 3.

3. Final Answer:

   0 1 2 -> Option D

4. Quick Check:

   break stops loop at 3, prints before it [OK]

Hint: Break stops loop before printing current value [OK]

Common Mistakes:

• Including the break value in output
• Confusing break with continue
• Assuming loop runs fully

4. Find the error in this code snippet:

for i in range(4):
    if i == 2:
        continue
    print(i)
    break

medium

A. The break is inside the loop and will stop after first iteration

B. continue is used incorrectly and causes syntax error

C. The loop will never run because of break before print

D. No error, code runs and prints 0, 1, 3

Solution

1. Step 1: Understand loop flow with continue and break

   When i == 2, continue skips print and break for that iteration. For other values, print runs then break stops loop immediately.

2. Step 2: Identify effect of break placement

   Break inside the loop after print causes loop to stop after first printed value, so only one value prints.

3. Final Answer:

   The break is inside the loop and will stop after first iteration -> Option A

4. Quick Check:

   Break stops loop early due to placement [OK]

Hint: Break after print stops loop early, continue skips iteration [OK]

Common Mistakes:

• Thinking continue causes syntax error
• Assuming loop prints all values
• Ignoring break effect inside loop

5. You want to print all numbers from 0 to 9 except 5, but stop printing if the number reaches 8. Which code snippet correctly uses break and continue?

hard

A. for i in range(10):
if i == 5:
break
if i == 8:
continue
print(i)

B. for i in range(10):
if i == 5:
continue
if i == 8:
break
print(i)

C. for i in range(10):
if i == 8:
continue
if i == 5:
break
print(i)

D. for i in range(10):
if i == 5:
continue
if i == 8:
continue
print(i)

Solution

1. Step 1: Understand requirements for skipping and stopping

   We skip printing 5 (use continue) and stop printing at 8 (use break).

2. Step 2: Check each option for correct order and logic

   for i in range(10): if i == 5: continue if i == 8: break print(i) correctly continues at 5 to skip it, breaks at 8 to stop loop, and prints others.

3. Final Answer:

   Option B code snippet -> Option B

4. Quick Check:

   continue skips 5, break stops at 8 [OK]

Hint: Continue skips unwanted, break stops loop early [OK]

Common Mistakes:

• Swapping break and continue conditions
• Using break to skip instead of continue
• Not stopping loop at 8