Rust int to string
last modified October 18, 2023
In this article we show how to convert integers to strings in Rust.
Integer to string conversion is a type conversion or type casting, where an entity of integer data type is changed into string one.
Rust int to string using to_string
The to_string function converts the integer value to a string.
main.rs
fn main() {
let val = 4;
let s1 = String::from("There are ");
let s2 = String::from(" hawks");
let msg = s1 + &val.to_string() + &s2;
println!("{}", msg)
}
In the program, we build a message from two strings and an integers. The integer
is converted to a string with to_string.
λ rustc main.rs λ ./main.exe There are 4 hawks
We compile and run the program.
Rust int to string with format!
We can do the conversion with the format! macro. It creates a
String using interpolation of runtime expressions.
main.rs
fn main() {
let val = 4;
let msg = format!("There are {val} hawks");
println!("{}", msg)
}
We build the message with the format! macro.
In this article we have performed int to string conversion in Rust.