Function read_usize

pub fn read_usize(msg: Option<&str>, err_msg: Option<&str>) -> usize

ARGUMENTS

‘msg’ (Option<&str>) - an optional message which will be printed at the same line as the input prompt. Must be set to Some(“…”) or None.

‘err_msg’ (Option<&str>) - an optional error message which will be printed if the user inputs an invalid value. Must be set to Some(“…”) or None.

DESCRIPTION

Prompts the user to type an integer value (usize) which will then be returned. In case the user writes an invalid value, they will be prompted to try again.

Provides an information message on the same line as the prompt if Some(“…”) is provided, and just the prompt if None is provided.

If err_msg is set to None, a default message will be shown.

RETURNS

An integer value of type usize provided by the user.

EXAMPLES

use quick_input::read_usize;
let user_usize_with_msg = read_usize(Some("Please input a number: "), Some("Please input a valid number."));

let user_usize: usize = read_usize(None, None);