rustWhen to use borrow in Rust

Borrowing in Rust is a way to temporarily take ownership of a value without taking ownership of it permanently. It is used when you want to use a value without taking ownership of it, such as when passing a value to a function.

Example:

let mut x = 5;
let y = &x;

println!("x = {}", x);
println!("y = {}", y);

Output example

x = 5
y = 5

In this example, x is a mutable variable with the value of 5. y is a reference to x, which means that y borrows the value of x without taking ownership of it. y can be used to access the value of x, but x still owns the value and can be modified.

The main benefit of borrowing is that it allows you to use a value without taking ownership of it, which can be useful in many situations. For example, when passing a value to a function, you can borrow the value instead of taking ownership of it.

List of ## Code explanation

1. let mut x = 5; - This line declares a mutable variable x with the value of 5.
2. let y = &x; - This line declares a reference to x, which means that y borrows the value of x without taking ownership of it.
3. println!("x = {}", x); - This line prints the value of x to the console.
4. println!("y = {}", y); - This line prints the value of y to the console.

Helpful links

• Rust Documentation - Borrowing
• Rust by Example - Borrowing

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