rustHow to make closure call itself in Rust

Closures in Rust can be called recursively by using the self keyword. To do this, the closure must be assigned to a variable, and then the variable can be used to call the closure. The following ## Code example shows how to make a closure call itself:

let mut closure = || {
    println!("Closure called");
    closure();
};
closure();

Output example

Closure called
Closure called
Closure called
...

Explanation

The ## Code example above creates a mutable variable closure which is assigned to a closure. The closure prints a message and then calls itself using the closure() syntax. Finally, the closure is called once to start the recursive loop.

The || syntax is used to create a closure, and the mut keyword is used to make the closure mutable so that it can be called multiple times.

Relevant links

• Closures in Rust
• Recursive Closures in Rust
• Mutable Variables in Rust

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