rust is a no garbage collection system-level programming language.
Next, I will be based on "simple terms rust" and https://kaisery.github.io/trpl-zh-cn/ch03-01-variables-and-mutability.html to organize and learn rust
rust has a nice package management tools cargo, install it.
cargo new helloworld
fn main() {
println!("Hello, world!");
}
cargo build in the target directory will see the results of it.
Why can println because the system is automatically inserted use std :: prelude :: *;
print! n some specifications print.
{: O} octal
{: X} hexadecimal
{: X} hex
{: P} Pointer
{: B} Binary
{: E} Science and Technology
{:?} Any value
{: #?} Line breaks and indentation.
Print you need.