Assign it without mut, if the variable has no value

[adiyahoo]

I have a variable without a value, but I can assign it without mut. I want to ask if, if the variable has no value, it can be assigned without mut.

sorry my English is bad

let a: u8; 
a = 10;
println!("{}", a);

[ScratchCat458]

As a technicality, the first line is a variable declaration, defining the type and name. The declaration does not initialize the value inside of a. You cannot access data from an uninitialized variable. Line 2 initializes it with the value 10, making it usable on line 3.

If you want more information on this, I recommend you read Chapter 5 of the Rustonomicon, which covers this topic in more detail.

[adiyahoo]

thank you I understand and read the documentation