What is "do" in Dart?

In this post we take a look at "do" keyword with some example codes.

In Dart, ```do`` is a keyword that is used in conjunction with thewhile` loop to create a loop that executes the loop body at least once before checking the loop condition.

The general syntax of a do-while loop in Dart is as follows:

do {
  // loop body
} while (condition);

In this syntax, the loop body is executed first, and then the condition is checked. If the condition is true, the loop body is executed again, and this continues until the condition becomes false.

Here is an example to illustrate the use of do:

void main() {
  int count = 0;
  do {
    print('Count is $count');
    count++;
  } while (count < 5);
}

In this example, we have created a do-while loop that executes the loop body at least once, even if the condition is initially false. The loop body prints the value of count to the console and increments the value of count by 1. The loop continues to execute until count is equal to 5.

When we run this code, we will see the following output:

Count is 0
Count is 1
Count is 2
Count is 3
Count is 4

In summary, the do keyword in Dart is used in conjunction with the while loop to create a loop that executes the loop body at least once before checking the loop condition. It is useful when you want to ensure that the loop body is executed at least once, even if the loop condition is initially false.

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