Understanding Flutter: Final vs Const - Know When to Use Each!
In Flutter, both final and const are used to declare constants, but they have different meanings and use cases:
final
Declares a variable that can only be assigned once.
The value of a final variable can be determined at runtime.
It is commonly used for variables whose values are known at runtime but won't change during the execution of the program.
Example:
final String appName = 'MyApp';
const
Declares a compile-time constant.
The value of a const variable must be known at compile-time.
It is commonly used for variables whose values are known at compile-time and won't change during runtime.
Example:
const double pi = 3.14;
In summary, final is used for variables whose values are known at runtime, while const is used for variables whose values are known at compile-time. Additionally, const variables are implicitly final, meaning they cannot be reassigned after they have been initialized.
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