Rust is a systems programming language that is designed for performance, safety, and concurrency. Here’s a quick overview of its unique features and some code blocks for common tasks.
Declare variables using the let keyword. Rust is a statically typed language, but it can infer the data type of a variable from its value.
let x = 10;
let c = 'a';
let f = 3.14;
Functions in Rust are declared using the fn keyword. They can take parameters and return values.
fn add(a: i32, b: i32) -> i32 {
return a + b;
}
Rust supports for, while, and loop loops for iterating over arrays or performing a task a certain number of times.
let numbers = [1, 2, 3, 4, 5];
for number in numbers.iter() {
println!("{}", number);
}
let mut i = 0;
while i < numbers.len() {
println!("{}", numbers[i]);
i += 1;
}
i = 0;
loop {
println!("{}", numbers[i]);
i += 1;
if i >= numbers.len() {
break;
}
}
Use if statements to execute code based on a condition. else if and else statements can be used to handle multiple conditions.
let x = 10;
if x > 0 {
println!("x is positive");
} else if x < 0 {
println!("x is negative");
} else {
println!("x is zero");
}
Rust provides built-in support for file manipulation, including reading and writing files, and interacting with the file system.
use std::fs;
fn main() {
let contents = fs::read_to_string("/path/to/file.txt")
.expect("Something went wrong reading the file");
println!("{}", contents);
fs::write("/path/to/file.txt", "New contents")
.expect("Something went wrong writing the file");
if fs::remove_file("/path/to/file.txt").is_ok() {
println!("File deleted successfully");
} else {
println!("Error deleting file");
}
}
Here are some resources to help you learn more about Rust: