JavaScript - charAt() method

revision:

Category : string

The charAt() method returns the character at a specified index (position) in a string. The index of the first character is 0, the second 1, ...

Syntax : 

        string.charAt(index)

Parameters:

index : optional. The index (position) of the character to be returned. Default is 0.

Examples:

        <p>charAt() returns the character at a specified index (position) in a string.</p>
        <p>Get the first character in a string:</p>
        <p id="demo"></p>
        <script>
            let text = "HELLO WORLD";
            let letter = text.charAt(0);

            document.getElementById("demo").innerHTML = letter;
        </script>

Practical examples

example: using the charAt() method on strings

code: 
                    <div>
                        <p id="at-1"></p>
                        <p id="at-2"></p>
                        <p id="at-3"></p>
                        <p id="at-4"></p>
                        <p id="at-5"></p>
                        <p id="at-6"></p>
                        <p id="at-7"></p>
                    </div>
                    <script>
                        let text = "HELLO WORLD";
                        document.getElementById("at-1").innerHTML = "string : " + text;
                        let letter = text.charAt(1);
                        document.getElementById("at-2").innerHTML = "second letter : " + letter;
                        let letter1 = text[1];
                        document.getElementById("at-3").innerHTML = "second letter : " + letter1;
                        let letter2 = text.charAt(text.length-1);
                        document.getElementById("at-4").innerHTML = "last letter : " + letter2;
                        let letter3 = text.charAt(15);
                        document.getElementById("at-5").innerHTML = "index out of range : " + letter3;
                        let letter4 = text.charAt();
                        document.getElementById("at-6").innerHTML = "letter : " + letter4;
                        let letter5 = text.charAt(3.14);
                        document.getElementById("at-7").innerHTML = "invalid index : " + letter5;
            
                    </script>