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flutter difference between ? operator and ! operator Code Example
flutter difference between ? operator and ! operator 
# Differences between "!" and "?" operators 
students?.first >> the value of blocks can be null
students!.first >> you inform the compiler that you are certain that blocks are not null.

final student = students!.first; >> means you are completely assured that List<Student>? students is initialized before block assignment.
final student = students?.first; >> block will be nullable, but in final student = students!.first;, block is not nullable.



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