Function read_input

pub fn read_input<T>(prompt: Option<&str>) -> Result<T, String>
where
    T: FromStr + Default,
    <T as FromStr>::Err: Display,

Reads input from the console, optionally displaying a prompt message.

This function can:

• Display a custom prompt message
• Read input until the user presses Enter
• Parse the input into any type that implements FromStr
• Act as a pause mechanism when no prompt is provided

Type Parameters

• T: The type to parse the input into. Must implement FromStr and Default.

Arguments

• prompt: An optional prompt message to display before reading input.

Returns

• T: The parsed input value
• String: The raw input string if parsing fails or no parsing is needed

Examples

let number: i32 = read_input(Some("Enter a number: ")).unwrap();
let name: String = read_input(Some("Enter your name: ")).unwrap();
read_input::<String>(None); // Acts as a pause

Examples found in repository

examples/some_tester.rs (line 23)

fn test_io() {
    let age = read_input::<u32>(Some("Enter your age: ")).unwrap();
    let name = read_input::<String>(Some("Enter your name: ")).unwrap();
    println!("Hello, {}! You are {} years old.", name, age);
}

fn test_pause() {
    read_input::<i128>(Some("Press Enter to continue...")); // * Input prompt
    read_input::<String>(None); // * Silent pause
}