rust create bigint from string
Rust provides the FromStr
trait for converting a string into a BigUint
(a big integer type). You can use the parse
method from the FromStr
trait to convert a string into a BigUint
. Here's an example:
use num::BigUint;
use std::str::FromStr;
fn main() {
let number_str = "1234567890";
let big_int = BigUint::from_str(number_str).unwrap();
println!("Big integer: {:?}", big_int);
}
In this example, the number_str
variable holds the string representation of the big integer. We use the from_str
method from the FromStr
trait to parse the string and convert it into a BigUint
value. If the parsing is successful, we can use the unwrap
method to get the actual BigUint
value. Finally, we print the big integer using println!
.
Make sure to add the num
crate to your Cargo.toml
file to use the BigUint
type and the FromStr
trait.