How to Use the Rust Compiler
To use the Rust Compiler, follow these steps:
- In the code editor, write your Rust code.
- Click the "RUN" button to compile and run your code.
- The output will be displayed in the console below the code editor.
Taking Inputs
In Rust, you can take inputs from the user in various ways. Here are some examples:
String Input
use std::io::{self, Read};
fn main() {
let mut input = String::new();
io::stdin().read_to_string(&mut input).unwrap();
println!("You entered: {}", input);
}
Number Input
use std::io;
fn main() {
let mut input = String::new();
io::stdin().read_line(&mut input).unwrap();
let num: i32 = input.trim().parse().unwrap();
println!("You entered: {}", num);
}
Importing Libraries
Rust has a rich set of built-in libraries that can be used in your programs. Here are some examples:
Using the Math Library
fn main() {
let result = f64::sqrt(25.0);
println!("Square root of 25 is {}", result);
}
Using the Vec Class
fn main() {
let arr = vec![1, 2, 3, 4, 5];
println!("Array: {:?}", arr);
}
Syntax 101
Rust is a multi-paradigm programming language focused on performance and safety, especially safe concurrency. Here's a primer on the major syntax basics of Rust:
Variables
Variables in Rust are immutable by default. You can make them mutable with the mut keyword.
let name = "John Doe"; // Immutable variable
let mut age = 25; // Mutable variable
Control Structures
Rust includes control structures such as if, else, for, while, and match.
// If-Else
if age > 18 {
println!("Adult");
} else {
println!("Minor");
}
// For loop
for i in 0..5 {
println!("{}", i);
}
// Match
match day {
"Monday" => println!("Start of the work week"),
"Friday" => println!("End of the work week"),
_ => println!("Midweek"),
}
Functions
Functions in Rust are defined with the fn keyword.
fn greet(name: &str) {
println!("Hello, {}", name);
}
greet("John Doe"); // Calls the function with "John Doe" as the argument
Rust Online Test
A Rust online test is an effective way to assess an individual's Rust programming skills, especially in the context of systems programming. These tests typically include a mix of theoretical questions and practical coding challenges. By attempting these tests, candidates can demonstrate their understanding of Rust concepts, their problem-solving abilities, and their proficiency in writing efficient code. Rust online tests are commonly used in technical interviews, coding bootcamps, and online learning platforms to gauge a learner's understanding and proficiency in Rust.
