Java continue Statement

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Introduction

The continue statement in Java is a control flow statement that is used to skip the current iteration of a loop and proceed to the next iteration. It is commonly used within for, while, and do-while loops to control the flow of the loop based on certain conditions.

What is a continue Statement?
Syntax of continue Statement
How continue Statement Works
Simple continue Statement Example
continue Statement in a for Loop
continue Statement in a while Loop
continue Statement in a do-while Loop
continue Statement in Nested Loops
Using continue with Labels
Conclusion

What is a continue Statement?

The continue statement is used to skip the remainder of the code in the current iteration of a loop and immediately proceed to the next iteration. This is particularly useful when you want to skip certain iterations based on specific conditions.

Syntax of continue Statement

Syntax:

continue;

How continue Statement Works

When the continue statement is encountered, the remaining code in the loop's current iteration is skipped.
The loop proceeds to the next iteration.
In a for loop, the update expression is executed before the next iteration.
In while and do-while loops, the condition is re-evaluated before the next iteration.

Simple continue Statement Example

Example:

public class SimpleContinueExample {
    public static void main(String[] args) {
        for (int i = 1; i <= 5; i++) {
            if (i == 3) {
                continue;
            }
            System.out.println("i: " + i);
        }
    }
}

Explanation: This loop prints the numbers 1, 2, 4, and 5. When i equals 3, the continue statement skips the remainder of the loop body, so 3 is not printed.

continue Statement in a for Loop

The continue statement can be used within a for loop to skip specific iterations based on a condition.

Example:

public class ContinueInForLoop {
    public static void main(String[] args) {
        for (int i = 1; i <= 10; i++) {
            if (i % 2 == 0) {
                continue;
            }
            System.out.println("Odd number: " + i);
        }
    }
}

Explanation: This loop prints only the odd numbers between 1 and 10 by skipping the even numbers.

continue Statement in a while Loop

The continue statement can also be used within a while loop to skip specific iterations.

Example:

public class ContinueInWhileLoop {
    public static void main(String[] args) {
        int i = 1;
        while (i <= 10) {
            if (i % 2 == 0) {
                i++;
                continue;
            }
            System.out.println("Odd number: " + i);
            i++;
        }
    }
}

Explanation: This loop prints only the odd numbers between 1 and 10 by skipping the even numbers.

continue Statement in a do-while Loop

The continue statement can be used within a do-while loop to skip specific iterations.

Example:

public class ContinueInDoWhileLoop {
    public static void main(String[] args) {
        int i = 1;
        do {
            if (i % 2 == 0) {
                i++;
                continue;
            }
            System.out.println("Odd number: " + i);
            i++;
        } while (i <= 10);
    }
}

Explanation: This loop prints only the odd numbers between 1 and 10 by skipping the even numbers.

continue Statement in Nested Loops

The continue statement can be used within nested loops to skip iterations of the inner loop.

Example:

public class ContinueInNestedLoops {
    public static void main(String[] args) {
        for (int i = 1; i <= 3; i++) {
            for (int j = 1; j <= 3; j++) {
                if (j == 2) {
                    continue;
                }
                System.out.println("i: " + i + ", j: " + j);
            }
        }
    }
}

Explanation: This loop skips the inner loop's iteration when j equals 2, so it does not print pairs where j is 2.

Using continue with Labels

Labels can be used with the continue statement to specify which loop to continue.

Example:

public class ContinueWithLabel {
    public static void main(String[] args) {
        outerLoop: for (int i = 1; i <= 3; i++) {
            for (int j = 1; j <= 3; j++) {
                if (j == 2) {
                    continue outerLoop;
                }
                System.out.println("i: " + i + ", j: " + j);
            }
        }
    }
}

Explanation: This loop uses a label outerLoop and continues the outer loop when j equals 2, skipping to the next iteration of the outer loop.

Conclusion

The continue statement in Java is a useful control flow tool that allows you to skip the current iteration of a loop and proceed to the next iteration. Understanding how to use continue effectively, including within nested loops and with labels, can help you write more efficient and readable code.

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