Java Break and Continue — Loop Control Statements

Sometimes you need to exit a loop early or skip certain iterations. Java provides break and continue for this.

---

break — Exit the Loop

break immediately terminates the innermost loop.

for (int i = 1; i <= 10; i++) {
    if (i == 5) {
        break;  // exit the loop
    }
    System.out.print(i + " ");
}
// Output: 1 2 3 4

Common Use: Search

int[] numbers = {3, 7, 2, 9, 5, 1};
int target = 9;

for (int i = 0; i < numbers.length; i++) {
    if (numbers[i] == target) {
        System.out.println("Found at index " + i);
        break;  // no need to keep searching
    }
}

---

continue — Skip to Next Iteration

continue skips the rest of the current iteration and jumps to the next one.

for (int i = 1; i <= 10; i++) {
    if (i % 3 == 0) {
        continue;  // skip multiples of 3
    }
    System.out.print(i + " ");
}
// Output: 1 2 4 5 7 8 10

Common Use: Filter

String[] names = {"Alice", "", "Bob", null, "Charlie"};

for (String name : names) {
    if (name == null || name.isEmpty()) {
        continue;  // skip invalid entries
    }
    System.out.println("Hello, " + name);
}

---

Break and Continue in While Loops

int i = 0;
while (true) {
    i++;
    if (i % 2 == 0) continue;  // skip even numbers
    if (i > 10) break;          // stop after 10
    System.out.print(i + " ");
}
// Output: 1 3 5 7 9

---

Labeled Break — Exiting Nested Loops

break only exits the innermost loop. To exit an outer loop, use a label:

outer:
for (int i = 0; i < 5; i++) {
    for (int j = 0; j < 5; j++) {
        if (i * j > 6) {
            System.out.println("Breaking at i=" + i + " j=" + j);
            break outer;  // exits BOTH loops
        }
    }
}
// Output: Breaking at i=2 j=4

Labeled Continue

outer:
for (int i = 0; i < 3; i++) {
    for (int j = 0; j < 3; j++) {
        if (j == 1) {
            continue outer;  // skip to next i
        }
        System.out.println("i=" + i + " j=" + j);
    }
}

Output:

i=0 j=0
i=1 j=0
i=2 j=0

---

When to Use Break vs Continue

Use break	Use continue
Found what you’re looking for	Skip invalid/unwanted items
Error condition — stop looping	Filter within a loop
Exit infinite loop	Skip special cases

---

Best Practices

1. Don’t overuse — if every iteration has break/continue, consider restructuring.
2. Labeled breaks are rare — if you need them often, extract the inner loop into a method.
3. Guard clauses with continue can simplify loop bodies:

// Without continue — deeply nested
for (Order order : orders) {
    if (order != null) {
        if (order.isValid()) {
            process(order);
        }
    }
}

// With continue — flat and clean
for (Order order : orders) {
    if (order == null) continue;
    if (!order.isValid()) continue;
    process(order);
}

---

Quick Exercises

1. Print numbers 1 to 20, but skip all multiples of 4.
2. Find the first negative number in an array and print its index.
3. Use a labeled break to exit a 3×3 nested loop when the sum of indices exceeds 3.

---

Summary

Statement	Effect
break	Exits the innermost loop
continue	Skips to the next iteration
break label	Exits the labeled outer loop
continue label	Skips to next iteration of outer loop

---

What’s Next?

You’ve mastered control flow. Now let’s learn how to organize code into reusable blocks — methods (functions): Functions in Java.