Learn JavaScript in 20 Minutes

learn_javascript_in_20_minutes.js

// Concept No. 1: Functions
console.log("hello, world");

// Concept No. 2: Variables
var myVariable = "Variables are containers which hold values.";

// Concept No. 3: Arrays
var myArray = [];
myArray[0] = "moo";
myArray[1] = "zoo";
myArray[2] = "doo";

// Concept No. 4: Loops (for and while)
for (var i = 0; i < myArray.length; i++) {
    console.log(myArray[i]);
}

i = 0;
while (i < myArray.length) {
  console.log(myArray[i]);
  i++;
}

// Concept No. 5 If-Statements
var mood = "engaged";
if (mood == "engaged") {
    console.log("What an exciting lesson on JavaScript!");
} else {
    console.log("This is quite a boring lessson on JavaScript...");
}