Skip to main content

Break, Continue, and Else

In Python, we can precisely control loop behavior using break to exit immediately and continue to skip the rest of the current iteration. Python also features a unique else clause for loops.

Using break and continue​

Use these to manage how our program handles specific items during iteration.

stock = {"Ginger": "out", "Lemon": "in-stock", "Mint": "discontinued"}

while True:
    choice = input("Enter flavor: ").strip().capitalize()
    status = stock.get(choice, "not-available")

    if status == "in-stock":
        print(f"Adding {choice} to our order.")
        break  # We found what we need, stop asking

    if status == "out":
        print("Sorry, we're out of that. Pick another.")
        continue  # Skip to the next iteration immediately

    print("Flavor not recognized.")

Output:

Enter flavor: Ginger
Sorry, we're out of that. Pick another.
Enter flavor: Apple
Flavor not recognized.
Enter flavor: Lemon
Adding Lemon to our order.

Nested Loop Control​

If we're using nested loops, break and continue only apply to the innermost loop they are in.

Breaking the Inner Loop​

# Type hint: a list containing lists of integers
matrix: list[list[int]] = [
    [1, 2, 3],
    [4, 5, 6],
    [7, 8, 9]
]

target = 5

for row in matrix:
    found = False

    for item in row:
        if item == target:
            print(f"Found {target}!")
            found = True
            break  # This only breaks the INNER loop (item in row)

    if found:
        print("Stopping the search.")
        break  # This breaks the OUTER loop (row in matrix)

Output:

Found 5!
Stopping the search.

The Loop else Clause​

The else block runs only if the loop finished naturally (without hitting a break). It is ideal for "search and find" logic to handle fallback cases when no match was found.

candidates = [("Amit", 16), ("Zara", 17), ("Raj", 15)]

for name, age in candidates:
    if age >= 18:
        print(f"{name} is eligible.")
        break
else:
    # This runs ONLY if the 'break' above was never triggered
    print("No eligible candidates found in the entire list.")

Output:

No eligible candidates found in the entire list.

Why Use Loop else?​

It is cleaner and more idiomatic than managing a manual boolean flag. It tells the reader: "If the loop finishes its work without finding what it's looking for, do this fallback action."