How do you know if its null or empty?

“dart empty object” Code Answer

Null-aware operators in dart allow you to make computations based on whether or not a value is null . It’s shorthand for longer expressions. A null-aware operator is a nice tool for making nullable types usable in Dart instead of throwing an error.

We can check a string is empty or not by the String Property isEmpty . If the string is empty then it returns True if the string is not empty then it returns False. Return : True or False.9 Ağu 2021

You can use the IsNullOrWhiteSpace method to test whether a string is null , its value is String. Empty, or it consists only of white-space characters.