How to fix Rust E0425 cannot find value in scope

The error E0425 occurs because the variable you are trying to use is not defined in the current scope or is private to a parent module. You must either define the variable, bring it into scope with a use statement, or change its visibility to pub.

// Example: Fixing a private function call from a child module
fn deliver_order() {}

mod back_of_house {
    // Error E0425: cannot find value `deliver_order` in this scope
    // Fix: Add `pub` to the parent function or use `super::` if already public
    fn fix_incorrect_order() {
        cook_order();
        super::deliver_order(); // Requires `deliver_order` to be `pub`
    }

    fn cook_order() {}
}

If the item is in a different module, ensure it is marked pub and imported:

mod kitchen {
    pub fn cook() {} // Must be public
}

use kitchen::cook; // Bring into scope

fn main() {
    cook(); // Now works
}

If the variable is a typo, correct the spelling to match the definition.

The Rust E0425 error means the computer cannot find the name you are using because it hasn't been defined yet or is hidden in a different section of your code. Think of it like trying to call a friend by a name they don't know or trying to enter a room without a key. You need to either define the name correctly or give your code permission to see it.