JavaScript syntax example

js_syntax_example.js

/*
A multi-line comment
 
Program Description:
 
A script that will display an alert box on Tuesday. Hot stuff.
*/

// declare variable
var current_day;

// create a function
var get_current_day = function() {
  // declare function variables
  var today;
  var day_of_the_week;
 
  // assign values to function variables
  today = new Date(); // object instantiation
  day_of_the_week = today.getDay(); // object method call

  // send back the current day of the week
  return day_of_the_week;
};

// store current day of the week in a variable
current_day = get_current_day();
 
// branching statement, block signified by curly braces
if (current_day === 2) {
  // method call
  alert("It's Tuesday. Time to write some code.");
} else {
  alert("It's not Tuesday. Time to study some code.");
}