Read user input from stdin in Rust
In this lesson we'll learn how to read user input from stdin, using Rust's std::io module and its Stdin object.
Instructor: [00:00] Reading user input from stdin can be done by importing the io module from Rust standard library. We then create an instance of stdin using the stdin() function. This comes with a method read_line. Read_line takes a mutable reference to a string buffer.
[00:20] Let's create a mutable variable name which is a string and we pass a reference to that to read_line. The reason read_line takes a mutable reference to a string buffer is because it will use this buffer to fill in the data that is entered by the user.
[00:43] After the user is done entering its data, we can output the data using println! We save the file and run the code. We'll notice that the compiler warns us about the fact that read_line returns something of type result, which can possibly be an error. It also tells us that the error should be handled.
[01:05] However, our program still functions. Let's type in our name, and we'll see the program outputs our name.