## 
### What is a flow builder?

**Flow** can provide multiple values and is built on top of the coroutines. Flow is a stream of data that is computed asynchronously. The data should be of the same type; if the flow is of type int, the values emitted by the flow should only be an integer.

Each flow needs to begin somewhere. A **flow builder** is an interface we use to build a flow. There are different ways in which we can build a flow. Let's discuss them one by one:
- `flowOf()`
- `asFlow()`
- `emptyFlow()`
- `flow()`





### The `flow()` function
It is the most popular way to build a flow. We start this builder with a flow function call, and inside that builder, we emit the values of the flow.

### Example

fun flow_builder(): Flow<String> = flow {
   emit ("A")
   emit ("B")
   emit ("C")
}

suspend fun main() {
   flow_builder()
       .collect { println(it) }
}

import React from 'react';
import { shallow, configure } from 'enzyme';
import Adapter from 'enzyme-adapter-react-16';

configure({ adapter: new Adapter() });

import HelloWorld from './app';

var TestResult = function() {
    this.succeeded = false;
    this.reason = "";
    this.input = "";
    this.expected_output = "";
    this.actual_output = "";
}

export const executeTests = function() {

  var results = [];

  result = new TestResult();
  result.input = 'HelloWorld Component';
  result.expected_output = "span containing text 'Hello World'"

  let wrapper = shallow(<HelloWorld />);

  // Call your Challenge function here.

  let type = wrapper.type();
  let testSuccessful = true;
  let failureReason;

  if (type !== 'span') {
    testSuccessful = false;
    failureReason = "You need to render exactly one span HTML element";
  } else if (wrapper.props().children != "Hello World") {
     testSuccessful = false;
     failureReason = "You have rendered wrong message in your span element";
  }

  result.actual_output = wrapper.html();

  if (testSuccessful) {
    result.succeeded = true;
    result.reason = "Succeeded"
  } else {
    result.succeeded = false;
    result.reason = failureReason;
  }

  results.push(result);

  return results;
}


kotlin

React

Dart

GoJS React

Typescript React

Vue.js

### Explanation
- **Line 1:** Create a function using flow builder of type String; that will print values of type string.
- **Line 2-4:** Use emit method to emit the values from the flow.

### The `flowof()` function
The `flowof()` function is the easiest way to build a flow. We use it to define a flow with a fixed amount of values.

### The `asFlow()` function
It is used to convert a sequence or a range into a flow. 

### The `emptyFlow()` function
As the name hints, it is used when we want to create an empty flow.

### Example

suspend fun main() {
    print("flowof() : ")
    flowOf(1, 3, 9, 16)
        .collect { print("${it} ") }

    println("")
    print("asFlow() : ")
    (1..10).asFlow()
        .collect { print("${it} ")}

    println("")
    print("emptyFlow() : ")
    emptyFlow<Int>()
       .collect { print(it) }    
}

### Explanation
- **Line 1:** Create a main suspending function.
- **Line 3:** Use the `flowof()` function for building a flow.
- **Lines 4, 9, and 14:** Use the `collect` method to print all the values the flow consists of.
- **Line 8:** Use the `asFlow()` function to convert a range or sequence into a flow.
- **Line 13:** Use the `emptyFlow()` function  to create a flow with no value.

kot.targ.gz

What are different types of flow builders in Kotlin coroutines?

Flow builders in Kotlin coroutines: flow(), flowOf(), asFlow(), and emptyFlow() facilitate diverse flow creation.

What are different types of flow builders in Kotlin coroutines?

What is a flow builder?

The flow() function

Example

Explanation

The flowof() function

The asFlow() function

The emptyFlow() function

Example

Explanation

The `flow()` function

The `flowof()` function

The `asFlow()` function

The `emptyFlow()` function