Continue statement behavior in Python

Introduction

The continue statement helps skip the rest of the current loop step and move to the next one. It lets you ignore certain cases without stopping the whole loop.

When you want to skip processing some items in a list but keep looping through the rest.

When filtering data inside a loop and ignoring unwanted values.

When you want to avoid nested if-else blocks by skipping early.

When reading lines from a file and ignoring empty or comment lines.

When you want to jump to the next iteration after a condition is met.

Syntax

Python

continue

The continue statement is used inside loops like for or while.

When Python sees continue, it skips the rest of the current loop step and starts the next one immediately.

Examples

This loop prints numbers 0 to 4 but skips printing 2 because of continue.

Python

for i in range(5):
    if i == 2:
        continue
    print(i)

This while loop skips printing 3 but prints other numbers from 1 to 5.

Python

i = 0
while i < 5:
    i += 1
    if i == 3:
        continue
    print(i)

Sample Program

This program prints numbers from 1 to 5 but skips number 3 using continue.

Python

for number in range(1, 6):
    if number == 3:
        continue
    print(f"Number is {number}")

Important Notes

Using continue can make your loops cleaner by avoiding deep nesting.

Be careful not to create infinite loops when using continue inside while loops without updating the loop variable.

Summary

continue skips the rest of the current loop step and moves to the next.

It works inside for and while loops.

Use it to ignore certain cases without stopping the whole loop.

Practice

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

easy

A. Exits the current function

B. Stops the entire loop immediately

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

D. Repeats the current iteration without moving forward

Solution

1. Step 1: Understand the role of continue

   The continue statement tells the loop to skip the remaining code in the current iteration.

2. Step 2: Identify the loop behavior 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 C

4. Quick Check:

   continue skips current step [OK]

Hint: Remember: continue skips current step, break stops loop [OK]

Common Mistakes:

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

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

easy

A. for i in range(5) { continue }

B. for i in range(5): continue

C. for i in range(5) continue

D. for i in range(5):
continue

Solution

1. Step 1: Check Python loop syntax

   Python requires a colon after the for statement and indentation for the loop body.

2. Step 2: Identify correct placement of continue

   continue must be inside the loop body, properly indented on the next line.

3. Final Answer:

   for i in range(5):\n continue -> Option D

4. Quick Check:

   Colon + indent + continue line [OK]

Hint: Use colon and indent for loop body with continue [OK]

Common Mistakes:

• Missing colon after for statement
• Writing continue on same line without colon
• Using braces {} which are not Python syntax

3. What is the output of this code?

for i in range(5):
    if i == 2:
        continue
    print(i)

medium

A. 0 1 3 4

B. 0 1 2 3 4

C. 2

D. 0 1

Solution

1. Step 1: Trace loop iterations and condition

   The loop runs i from 0 to 4. When i is 2, continue skips printing.

2. Step 2: List printed values

   Values printed are 0, 1, 3, and 4 because 2 is skipped.

3. Final Answer:

   0 1 3 4 -> Option A

4. Quick Check:

   continue skips i=2 print [OK]

Hint: Skip printing when continue triggers, others print [OK]

Common Mistakes:

• Including 2 in output
• Thinking continue stops loop
• Confusing continue with break

4. Find the error in this code snippet:

i = 0
while i < 5:
    if i == 3:
        continue
    print(i)
    i += 1

medium

A. Infinite loop because i is not incremented when i == 3

B. SyntaxError due to missing colon

C. Prints numbers 0 to 4 correctly

D. TypeError because of continue in while loop

Solution

1. Step 1: Analyze loop and continue effect

   When i equals 3, continue skips the rest, so i += 1 is not executed.

2. Step 2: Understand consequence

   Since i stays 3 forever, the loop never ends, causing an infinite loop.

3. Final Answer:

   Infinite loop because i is not incremented when i == 3 -> Option A

4. Quick Check:

   continue skips i++ causes infinite loop [OK]

Hint: Increment loop variable before continue or use else [OK]

Common Mistakes:

• Ignoring that continue skips increment
• Thinking continue causes syntax error
• Assuming loop ends normally

5. You want to print all numbers from 1 to 10 except multiples of 3 using a for loop and continue. Which code correctly does this?

hard

A. for i in range(1, 11):
if i % 3 == 0:
pass
else:
print(i)

B. for i in range(1, 11):
if i % 3 == 0:
continue
print(i)

C. for i in range(1, 11):
if i % 3 == 0:
break
print(i)

D. for i in range(1, 11):
if i % 3 != 0:
continue
print(i)

Solution

1. Step 1: Understand the goal

   We want to skip printing numbers divisible by 3, so use continue when i % 3 == 0.

2. Step 2: Check each option

   for i in range(1, 11): if i % 3 == 0: continue print(i) skips multiples of 3 correctly and prints others. for i in range(1, 11): if i % 3 != 0: continue print(i) skips non-multiples wrongly. for i in range(1, 11): if i % 3 == 0: break print(i) breaks loop early. for i in range(1, 11): if i % 3 == 0: pass else: print(i) uses pass but prints all except multiples of 3 correctly but without continue.

3. Final Answer:

   for i in range(1, 11): if i % 3 == 0: continue print(i) -> Option B

4. Quick Check:

   continue skips multiples of 3 print others [OK]

Hint: Use continue to skip unwanted cases inside loop [OK]

Common Mistakes:

• Using break instead of continue
• Reversing condition logic
• Not skipping multiples of 3