Hello friends in this article I would like to share with you how to write a program to check if the given number by the user is odd or even number using Rust Programming language. Yesterday I am attending a lecture in Mozilla Philippines office here in Makati City, Philippines. The talk is given by Sir Bob Reyes a Mozilla representative here in the Philippines he is discussing the Rust programming language I found his lecture interesting because Rust is designed for systems programming and best of all it is open source.
Rust is a programming language that is developed by Mozilla foundation the creator of Mozilla Firefox web browser one of the most popular and secure web browser in the world. I hope you will give a try to learn Rust.
In this program it will ask the user to give a number and then our program will determine whether the given number is odd and even.
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My mobile number here in the Philippines is 09173084360.
Sample Program Output
Program Listing
odd_even.rs
// Odd and Even Number Checker in Rust Programming language.
// Written By: Mr. Jake R. Pomperada, MAED-IT
// July 17, 2016
use std::io::{self, Write};
use std::fmt::Display;
use std::process;
fn main() {
println!("\n");
println!("\tOdd and Even Number Checker in Rust");
println!("\n");
let value: i32 = grab_input("Enter a Number ")
.unwrap_or_else(|e| exit_err(&e, e.raw_os_error().unwrap_or(-1)))
.trim()
.parse()
.unwrap_or_else(|e| exit_err(&e, 2));
if value % 2 == 0 {
println!("\n");
println!("The number {} is an EVEN number.",value);
} else {
println!("\n");
println!("The number {} is an ODD number.",value);
}
println!("\n");
println!("End of Program");
}
fn grab_input(msg: &str) -> io::Result<String> {
let mut buf = String::new();
print!("{}: ", msg);
try!(io::stdout().flush());
try!(io::stdin().read_line(&mut buf));
Ok(buf)
}
fn exit_err<T: Display>(msg: T, code: i32) -> ! {
let _ = writeln!(&mut io::stderr(), "Error: {}", msg);
process::exit(code)
}
