Fix Rust E0308 mismatched types by ensuring variable types align or explicitly converting values before assignment.
Error E0308 occurs when you try to assign a value of one type to a variable expecting a different type. Fix it by ensuring the types match or by explicitly converting the value using .to_string() or .parse().
let age: u32 = 30;
let message = format!("Age: {}", age); // Correct: u32 converted to string context
// Incorrect: let message: String = age; // E0308: mismatched types
Error E0308 "mismatched types" means you are trying to put a square peg in a round hole. Rust requires you to be explicit about data types, so you must convert a number to text or vice versa before combining them. Think of it like trying to pour a liquid into a container meant for solids; you need to change the state first.