Palindromic Number in Rust

Welcome to the Palindromic Number 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

use std::env::args;
use std::process::exit;
use std::str::FromStr;
use std::fmt::Display;

fn usage() -> ! {
    println!("Usage: please input a non-negative integer");
    exit(0);
}

fn parse_int<T: FromStr>(s: &str) -> Result<T, <T as FromStr>::Err> {
    s.trim().parse::<T>()
}

fn is_palindromic_number<T: Display>(n: T) -> bool {
    // Source: https://stackoverflow.com/questions/24542115/how-to-index-a-string-in-rust

    // Convert number to string
    let s: String = n.to_string();

    // Check if palindrome by comparing left half of string with reversed right half of string
    let half_s_len: usize = s.len() / 2;
    s.chars().take(half_s_len).eq(s.chars().rev().take(half_s_len))
}

fn main() {
    let mut args = args().skip(1);

    // Convert 1st command-line argument to integer
    let n: u32 = args
        .next()
        .and_then(|s| parse_int(&s).ok())
        .unwrap_or_else(|| usage());

    // Determine if palindromic number and display result
    println!("{}", is_palindromic_number::<u32>(n));
}

Palindromic Number in Rust was written by:

• rzuckerm

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 May 08 2023 19:53:07. The solution was first committed on Apr 09 2023 10:36:45. As a result, documentation below may be outdated.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.