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flutter difference between ? operator and ! operator

Snippets answered on December 19, 2021 Popularity 9/10 Helpfulness 3/10

answer flutter difference between ? operator and ! operator

related operators vs symbols in flutter

flutter difference between ? operator and ! operator

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# 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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Contributed on Dec 19 2021

Snippets

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operators vs symbols in flutter

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// Symbols are something that stands for or indicates something 
// Operators are like Arithmetic Operators(+,-,*,/), Logical Operators(&&,||,!)...etc.

Popularity 6/10 Helpfulness 1/10 Language dart

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Contributed on May 11 2023

Magnificent Moose

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flutter difference between ? operator and ! operator

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flutter difference between ? operator and ! operator

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operators vs symbols in flutter

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