rustWhat is the default value of a variable in Rust?

The default value of a variable in Rust is (), which is an empty tuple. This is also known as the unit type.

let x = ();
println!("{:?}", x);

Output example

()

The code above declares a variable x with the default value (). The println! macro prints the value of x which is ().

• let x = (); declares a variable x with the default value ().
• println!("{:?}", x); prints the value of x which is ().

Helpful links

• Rust Documentation - Variables
• Rust Documentation - Primitive Types

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