Break and Continue in Dart#

Usage in Loops#

Break Statement to Exit Loops#

About#

The break statement in Dart is used to exit from a loop immediately, regardless of whether the loop’s condition is still true. It is commonly used when you need to terminate the loop prematurely based on some condition.

How to Use#

• Place the break statement inside the loop body.
• Typically used in conjunction with an if statement to determine when to exit the loop.

How It Works#

• When the break statement is executed, the loop stops immediately.
• Control is transferred to the statement following the loop.

Example#

void main() {
  for (int i = 0; i < 10; i++) {
    if (i == 5) {
      break; // Exit the loop when i equals 5
    }
    print(i);
  }
}

In this example:#

• The loop iterates from 0 to 9.
• When i equals 5, the break statement is executed, terminating the loop.
• Numbers 0 through 4 are printed before exiting.
• Continue Statement to Skip Iterations

About#

The continue statement in Dart is used to skip the remaining code in the current iteration of a loop and proceed with the next iteration. It is useful when you want to avoid executing certain parts of the loop’s code block based on a condition.

How to Use#

• Place the continue statement inside the loop body.
• Typically used within an if statement to skip over specific iterations.

How It Works#

• When the continue statement is executed, the current iteration of the loop is skipped.
• Control moves to the next iteration of the loop, re-evaluating the loop condition.

Example#

void main() {
  for (int i = 0; i < 10; i++) {
    if (i % 2 == 0) {
      continue; // Skip even numbers
    }
    print(i);
  }
}

In this example:

• The loop iterates from 0 to 9.
• When i is even, the continue statement is executed, skipping the print statement.
• Only odd numbers (1, 3, 5, 7, 9) are printed.

Overall#

The break and continue statements provide control over loop execution in Dart. Use break to exit a loop early based on a condition, and continue to skip specific iterations and proceed with the next one. These statements enhance the flexibility and efficiency of your loop constructs.