public/subjects/borrow

borrow

Instructions

Create a function named str_len, you'll need to complete the function signature. Your function should accept a string or a string literal, and return its length without taking ownership of the value (i.e, borrowing the value).

Expected functions

pub fn str_len(s: ) -> usize {
}

Usage

Here is a possible program to test your function:

use borrow::*;

fn main() {
	let s = "hello";
	let s1 = "camelCase".to_string();

	println!("\tstr_len(\"{}\") = {}", s, str_len(s));
	println!("\tstr_len(\"{}\") = {}", s1, str_len(&s1));
}

And its output:

$ cargo run
str_len("hello") = 5
str_len("camelCase") = 9
$

Notions

• Primitive Type str