Rust

Learning RUST programming language and documenting my learning

Hello World - Rust !

fn main(){
	println!("Hello world")
	}

To compile rust code

$ rustc hello_world.rs

Run the binary

$ ./hello_world

Cargo

cargo is rust’s build tool and package manager, to manage dependencies and its versions,basically crates. cargo uses TOML format stands for Tom’s Obvious Minimal language,which is cargo’s configuration format.

Cargo useful commands

$ cargo new hello_cargo --vcs=git
$ cd  hello_cargo

on creating a new cargo project the source files are to be present within the src/ directory and also Config.toml file is generated.

1. cargo build

$cargo build
   Compiling hello_cargo v0.1.0 (/home/vinay/learn/rust/hello_cargo)
    Finished dev [unoptimized + debuginfo] target(s) in 0.17s

a target/ directory is created

the binary is within the target/debug directory

$ ls target/debug/
build  deps  examples  hello_cargo  hello_cargo.d  incremental

$ ./target/debug/hello_cargo
Hello, world!

2. cargo run

$ cargo run
    Finished dev [unoptimized + debuginfo] target(s) in 0.00s
     Running `target/debug/hello_cargo`
Hello, world!

instead of two commands of compiling and running the binary, cargo run is a simple command,which compiles and runs the binary

3. cargo check

compiles the code but does not produce an executable.A

$ cargo check
    Checking hello_cargo v0.1.0 (/home/vinay/learn/rust/hello_cargo)
    Finished dev [unoptimized + debuginfo] target(s) in 0.02s