JavaScript Introduction
Variables, Operators and Data Types
Control Flow
OOP and DOM
Error Handling and Regular Expression
JSON and Asynchronous Programming
Hand-On JavaScript Projects
Bonus Section

Strings

Topic
Materials

"Hello World"
'Hello World'
"Hello " World"
"Hello  World"
"Hello n World"
'Hello ' World'
'Hello t World'

//Concatenation
"Hello" + "World"


var x = "Hello World";

//Length of String
x.length; //It is a property

//Indexing
"Hello World"[0]
"Hello World"[3]
x = "Hello World";
x[0]
x[3]

//Immutable
x[1]
x[1] = "5"
x[1]


// return a new string, doesn't change x
//These are methods
x.slice(1, 5);
x.slice(-6, -1);
x.substr(3, 2); // 2nd parameter means the length
x.replace("Hello", "World");
x.toUpperCase();
x.toLowerCase();
x.concat("1", "2");
x.trim();


//links
//https://www.w3schools.com/jsref/jsref_obj_string.asp
//https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String
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