Dart Future.microtask()
Syntax & Examples

Future.microtask constructor

The `Future.microtask` constructor in Dart creates a future containing the result of calling a computation asynchronously with `scheduleMicrotask`.

Syntax of Future.microtask

The syntax of Future.Future.microtask constructor is:

Future.microtask(FutureOr<T> computation())

This Future.microtask constructor of Future creates a future containing the result of calling computation asynchronously with scheduleMicrotask.

Parameters

ParameterOptional/RequiredDescription
computationrequiredThe computation to be executed asynchronously.

✐ Examples

1 Execution of a microtask

In this example,

  1. We use `Future.microtask` to execute a microtask asynchronously.
  2. Inside the microtask, we print a message.

Dart Program

void main() {
  Future.microtask(() {
    print('Microtask executed.');
  });
}

Output

Microtask executed.

2 Execution of a computation with a variable

In this example,

  1. We create an integer variable `num` with the value 10.
  2. We use `Future.microtask` to execute a microtask asynchronously.
  3. Inside the microtask, we print the double of `num`.

Dart Program

void main() {
  int num = 10;
  Future.microtask(() {
    print('Double of $num is ${num * 2}');
  });
}

Output

Double of 10 is 20

3 Execution of a microtask with a list

In this example,

  1. We create a list of integers `numbers`.
  2. We use `Future.microtask` to execute a microtask asynchronously.
  3. Inside the microtask, we iterate over the list and print each number.

Dart Program

void main() {
  List<int> numbers = [1, 2, 3, 4, 5];
  Future.microtask(() {
    for (int number in numbers) {
      print(number);
    }
  });
}

Output

1
2
3
4
5

Summary

In this Dart tutorial, we learned about Future.microtask constructor of Future: the syntax and few working examples with output and detailed explanation for each example.