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Strings

In javascript, string can be created by wraping inside a double quotes("") or single quotes('').

Example

"Hello world!";
"Hi, hello";
Note

There is no difference while using single quotes or double quotes.

String property​

The .length property can be used to determine the length of the string.

Which can be explained using an example

// Find the length of the string "hello world!"
let string = "hello world!";
console.log(string.length); // 12

Basic string methods​

Some common methods for string are:

.toLowerCase()​

This will return a new string with all characters in lower case.

"Hello World!".toLowerCase(); // hello world!

.toUpperCase()​

This will return a new string with all characters in upper case.

"Hello World!".toUpperCase(); // HELLO WORLD!
Note

.toUpperCase() and .toLowerCase() requires () but .length() not. It is because .length is a property(a value that is already computed) whereas others are action that we are performing. So they require ().