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Continue

In C++, the continue statement is used inside loops (such as for, while, or do-while loops) to skip the current iteration of the loop and immediately proceed to the next iteration. When encountered, continue effectively bypasses the remaining code within the current iteration and goes directly to the loop's condition check or update step. Here's how continue works:

Program:

for (int i = 1; i <= 5; i++) {
    if (i == 3) {
        continue; // Skip iteration when i equals 3
    }
    std::cout << i << " ";
}

In this example, when i is equal to 3, the continue statement is executed, and the loop proceeds directly to the next iteration. As a result, the number 3 is skipped, and the output will be 1 2 4 5.

Key points about the continue statement:
  • continue only affects the innermost loop in which it is used. If have nested loops, it will skip the current iteration of the innermost loop.
  • It's important to use continue judiciously because excessive use it can make code less readable and harder to maintain. In some cases, refactoring the loop or using other control structures might lead to cleaner code.
  • Be cautious when using continue with loops that involve complex logic or multiple conditions, as it it can affect the flow of program and lead to unexpected results if not used carefully.
  • The continue statement it can be used in both for and while loops, as well as do-while loops.
Here's an example of continue used in a while loop:
Program:

int i = 1;

while (i <= 5) {
    if (i == 3) {
        i++;
        continue; // Skip iteration when i equals 3
    }
    std::cout << i << " ";
    i++;
}

In this while loop, the same logic applies, and the number 3 is skipped during iteration.


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