Rust basics part - 2

So in the last article we have started learning about the basic syntax of rust where we learnt about function or (fn) main and variables and printing lines . Those who didn't check the last article view it to catch up .

Now we are going to learn how to get input in rust . For input and output in rust we have to use the standard library . So in the standard library there is a crate named io which stands for input/output .

In Detail about the standard library

How to use input / output ?

Input/Output crate is used to for input or to get a output from the user

use std::io ; //Mentioning the crate and library which we are using
              // The '::' is to mention in which library this crate is
              //It can be metioned anywhere except inside the fn main()
fn main() {
    let mut a = String::new() ;
     io::stdin()
    .read_line(&mut a)
    .expect("Failed to read line"); 
    println!("A is : {} " , a);

So let's break this down into steps

Step 1 : We add the line use std::io which means that we are going to use the input/output crate .

Step 2 : We assign The Strings::new function to the variable 'a' .

Step 3 : We call the input/output function from the standard library.

Step 4 : We add to statements ,

( i )read_line is a command for waiting and getting the input .

( ii )"expect" is a another method which tells the compiler to expect a error crash .

And finally we print a is: and the value of a given from the user .

Float : A data type

So float is an another data type like an integer .

fn main {
x: f32 = 34.5 ;
}

So a float is basically decimals in rust which are denoted by the keyword : f32 . There are only f32 , f64 for more detail explanation and other different data types please wait for the data types article coming up soon.

Note :

Please kindly check the previous Rust Basics series article for updates now an then.