Edit in JSFiddle

//Accessing characters
let str1 = "Hello\r\nWorld";
let str2;

// the first character
document.getElementById("result").innerText = str1[0];

str2 = `\r\n ${str1.charAt(str1.length - 1)}`;
document.getElementById("result").innerHTMl += str2;

<h1>String</h1>

<h2>Accessing characters</h2>

<blockquote>
<code>let str1 = "Hello\r\nWorld";</code>
<br />
result:<br />
<span id="result"></span>
</blockquote>