When should I use `break` versus `continue` in a Python loop?

Ask yourself: “Am I done with the whole loop, or just done with this item?”

Use break when you are done with the loop and want it to stop. Use continue when this item should be ignored or handled no further, but the loop should move on to later items. Python defines break as terminating the nearest enclosing loop and continue as moving to its next cycle. [S1]

A short memory aid: break out; continue onward.

Here is a search through a list of names. The example assumes the list and search term have already been chosen:

names = ["Mina", "Omar", "Tariq"]
target = "Omar"

for name in names:
    if name == target:
        print("Found:", name)
        break

When the loop reaches "Omar", it prints the match and break stops the loop. It does not check the remaining names. If the match is first, it stops after that first item; if it is last, it checks earlier items before stopping. If there is no match, the if condition never becomes true, so this loop finishes normally without printing a match. This example does not report “not found”; you would need separate logic for that if you want such a message.

Use break here because finding the target means there is no need to keep searching. The statement stops the nearest enclosing loop, not every loop in a program. [S1]

Suppose you want to print the names that are not empty strings. The example assumes names may contain empty strings:

names = ["Mina", "", "Omar", "Tariq"]

for name in names:
    if name == "":
        continue
    print(name)

When name is empty, continue skips the rest of that cycle, including the print, and moves on to the next name. The later names still get checked and printed. Here the output is Mina, Omar, and Tariq on separate lines. Without continue, the loop would reach print(name) for the empty string too.

A useful check is to put an item you intend to skip before an item you intend to keep. If the later item still gets processed, you have the intended skip-and-carry-on behavior. If you instead want processing to stop as soon as a condition is met, use break. Python’s descriptions cover for and while loops. [S1]

Before choosing, name the effect you want in plain language: “stop searching now” points to break; “skip this item, then keep going” points to continue. Then trace what happens to the next item. For nested loops, remember that either statement affects only the nearest enclosing loop, meaning the innermost loop containing it. [S1] If you need a different control flow, do not assume one of these statements will exit multiple loops; plan that behavior explicitly.

For example, imagine an outer loop over groups and an inner loop over names. A break inside the inner loop ends that inner loop, but the outer loop can continue with its next group. A continue there starts the next cycle of the inner loop. [S1] Read the indentation to identify which loop contains the statement, then trace a small case where the condition occurs early and one where later items remain.