Error code E0384
An immutable variable was reassigned.
Erroneous code example:
fn main() { let x = 3; x = 5; // error, reassignment of immutable variable }
By default, variables in Rust are immutable. To fix this error, add the keyword
mut
after the keyword let
when declaring the variable. For example:
fn main() { let mut x = 3; x = 5; }
Alternatively, you might consider initializing a new variable: either with a new bound name or (by shadowing) with the bound name of your existing variable. For example:
fn main() { let x = 3; let x = 5; }