Flutter What is void

Functions like this are called void, and they return None, Python’s special object for “nothing”. Here’s an example of a void function: >>> def sayhello(who): print ‘Hello,’, who + ‘!’ print ‘What a lovely day.

In order to write any Dart program, be it a script or a Flutter app, you must define a function called main . void main() { print(‘Hello, Dart’); } This function tells Dart where the program starts , and it must be in the file that is considered the “entry point” for you program.

Dart: How to pass a function into a function (using a Function as a method parameter)

When used as a function return type, the void keyword specifies that the function doesn’t return a value . When used for a function’s parameter list, void specifies that the function takes no parameters.