A Future is defined exactly like a function in Dart, but instead of Void you use Future. If you want to return a value from Future, then you pass it a Type .
Read moreWhat is then in Dart?
then<R> method Null safety Register callbacks to be called when this future completes . When this future completes with a value, the onValue callback will be called with that value. If this future is already completed, the callback will not be called immediately, but will be scheduled in a later microtask.
Read moreWhat does await do in flutter?
When you await an asynchronous function, the execution of the code within the caller suspends while the async operation is executed . When the operation is completed, the value of what was awaited is contained within a Future object.
Read moreWhy we use async and await in flutter?
Async and Await keywords are used to provide a declarative way to define the asynchronous function and use their results . The async keyword is used when we want to declare a function as asynchronous and the await keyword is used only on asynchronous functions.
Read moreWhat is async await and Future in flutter?
Async means that this function is asynchronous and you might need to wait a bit to get its result. Await literally means – wait here until this function is finished and you will get its return value. Future is a type that ‘comes from the future’ and returns value from your asynchronous function.
Read moreWhat is difference between async and async * In Flutter?
The difference between both is that async* will always return a Stream and offer some syntax sugar to emit a value through the yield keyword . async gives you a Future and async* gives you a Stream. When users marks a function as async or async* allows it to use async/await keyword to use a Future.
Read moreWhy async and await is used?
await can be used on its own with JavaScript modules. Note: The purpose of async / await is to simplify the syntax necessary to consume promise-based APIs . The behavior of async / await is similar to combining generators and promises. Async functions always return a promise.
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