JavaScript
 
JavaScript is a programming language that can be used to add interactivity to a website.
 
Some examples:
 
If statement:
 
var iceCream = 'chocolate';
if (iceCream === 'chocolate') {
  alert('Yay, I love chocolate ice cream!');    
} else {
  alert('Awwww, but chocolate is my favorite...');    
}
 
Function definition:
 
function multiply(num1,num2) {
  var result = num1 * num2;
  return result;
}
 
Event:
 
document.querySelector('html').onclick = function() {
    alert('Ouch! Stop poking me!');
}
 
 
 
Source:
https://developer.mozilla.org/en-US/Learn/Getting_started_with_the_web/JavaScrip
t_basics