You can do this in two ways:
Read moreHow do you check if a variable is null in darts?
Checking Nulls and Null-Aware Operators in Dart
Read moreWhat is exclamation mark in Dart?
“!” is a new dart operator for conversion from a nullable to a non-nullable type . Read here and here about sound null safety. Use it only if you are absolutely sure that the value will never be null and do not confuse it with the conditional property access operator.4 Ağu 2020
Read moreWhat is Dart null?
The keyword for Null in the programming language Dart is null. Null means a variable which has no values assign ever and the variable is initialized with nothing like .
Read moreHow do you use null safety in darts?
The Dart language now supports sound null safety! When you opt into null safety, types in your code are non-nullable by default, meaning that variables can’t contain null unless you say they can . With null safety, your runtime null-dereference errors turn into edit-time analysis errors.
Read moreWhat is late in Dart flutter?
the late modifier is part of the new null-safety by dart it’s used to tell the compiler to treat this variable as non-nullable and will be initialized later without it the compiler will treat the variable as nullable and give error.
Read moreHow do you fix a null safety error in Flutter?
Click on “main. dart” at top of IDE, and click on “Edit Configuration”. Note: You need to add Flutter and Dart plugin on android studio, otherwise this menu is not available. Copy: –no-sound-null-safety and add into “additional run args” .
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