Write a program to ask the user to give radius value of a circle and then the program will compute the area of the circle and display the results on the screen using Rust programming language.

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Program Listing
// area.rs

use std::io;

fn main() {
    let  radius:f32;
    let  area:f32;
    let mut input = String::new();
    println!("Area of a Circle Using Rust\n");

    println!("Give Radius Value: ");
    io::stdin().read_line(&mut input).expect("Not a valid string");

    radius = input.trim().parse().expect("Not a valid number");

    //Caculate the area of circle
     area = 3.14 * radius * radius;
    println!("The area of the circle is {:.2}.",area);
    println!("End of Program");