If you want to represent a single character, you just use a string consisting of that single character.
To find the length of a string (in code units), access its
'hello'.length; // 5
We can use strings like objects too. They have methods as well that allow you to manipulate the string and access information about the string:
'hello'.charAt(0); // "h" 'hello, world'.replace('world', 'mars'); // "hello, mars" 'hello'.toUpperCase(); // "HELLO"