Fibonacci in Rust

Published on 28 April 2022 (Updated: 05 February 2023)

Fibonacci in Rust

Welcome to the Fibonacci in Rust page! Here, you’ll find the source code for this program as well as a description of how the program works.

Current Solution

const LIMIT: u64 = 93;

fn fibonacci(terms: u64) {
    if terms > LIMIT {
        println!("The number of terms you want to calculate is too big!");
        println!("The limit is {}.", LIMIT);
    } else {
        let mut i = 0u64;
        let mut a = 0u64;
        let mut b = 1u64;
        let mut c = 0u64;
        while i < terms {
            println!("{}", c);

            c = a + b;
            b = a;
            a = c;
            i += 1;

fn main() {
    let mut terms = String::new();
    let mut terms_n: u64 = 0;

    if std::io::stdin().read_line(&mut terms).is_err() {
        println!("Could not read from keyboard!");
    } else {
        terms_n = terms.parse().unwrap();


Fibonacci in Rust was written by:

If you see anything you’d like to change or update, please consider contributing.

Note: The solution shown above is the current solution in the Sample Programs repository as of Oct 05 2018 10:31:35. The solution was first committed on Oct 05 2018 09:33:10. As a result, documentation below may be outdated.

How to Implement the Solution

No ‘How to Implement the Solution’ section available. Please consider contributing.

How to Run the Solution

No ‘How to Run the Solution’ section available. Please consider contributing.