String methods and properties
Strings can have methods and properties exactly like objects.
One of the commonest properties is the length property who returns the length of a string and how many characters this string is comprised of.
Another important method is the split method. That splits actually a string into a smaller strings, and then it puts them as elements into an array. The new array is comprised of string elements and you can work individually with every substring. Split is a method, that means that you can also pass an argument and specify every WHICH character occurrence you want to split your main string.
For example if you have a string like: let sentence = 'this sentence is nonsense',
sentence.split('') // Splits every single character into an array. ['t', 'h', 'i', 's', ' ', 's', 'e', 'n', 't'] etc.
sentence.split(' ') (with a space inside the argument. Splits every time it finds a space. So we end up with something like. ['this', 'sentence', 'is', 'nonsense'].
