How to concatenate a char onto a string in Rust?

Question

I have tried using the to_string method on the char but this returns a &str when I need a String.

Thanks for your reply. Maybe i got horribly confused somewhere. Chronium's answer is perfect however. — unskilledidiot
– unskilledidiot, Commented Jun 17, 2016 at 20:40

trent · Accepted Answer · 2021-02-25 21:22:08Z

84

Using String::push method is the easiest method:

let mut a_string = String::from("Hello World"); a_string.push('!');

edited Feb 25, 2021 at 21:22

trent

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answered Jun 17, 2016 at 20:14

Chronium

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Comments

Zombo · Accepted Answer · 2021-02-25 21:08:44Z

You can also use format!:

fn main() { let s = String::from("March"); // example 1 let s1 = format!("{}!", s); // example 2 let s2 = format!("{}{}", s, '!'); // print println!("{} {}", s1, s2); }

https://doc.rust-lang.org/std/macro.format.html

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