app.js

// this is a single line comment
//

/* this
 * is
 * a
 * awesome
 * multiline
 * comment
 */

var a = 3;
var b = 2;
var c = a + b;

console.log('this is a string');
console.log(a);
console.log(b);
console.log(c);

var first = "sally";
var last = 'smith';
var fullName = first + ' ' + last;
console.log(first);
console.log(last);
console.log(fullName);

var d = Math.pow(2, 8);

console.log('2^8 ===', d);

a = 3;
b = 4;
c = 5;
d = 6;

console.log(Math.pow((((a+b)/(b-c))*((b-a)/(c-d))), (b + a)));

// branching with if/else statements
//


var age = 4;

if(age >= 21){
  console.log("you are legal to drink");
}else{
  console.log('you are not legal to drink');
}

//this is the maximum allowed rating you can see

if(age >=  0 && age <=  5){
  console.log('G rated');
}else if(age <= 12){
  console.log('PG rated');
}else if(age <= 16){
  console.log('PG-13 rated');
}else if(age === 17){
  console.log('R rated');
}else if(age === 18){
  console.log('NC-17 rated');
}else{
  console.log('X rated');
}

var color = 'clue';
switch(color){
  case 'green':
    console.log('i see green');
    break;
  case 'blue':
    console.log('i see blue');
    break;
  case 'orange':
    console.log('i see orange');
    break;
  case 'pink':
    console.log('i see pink');
    break;
  case 'black':
    console.log('i see black');
    break;
  default:
    console.log('that is not a valid color');
}


// while loop
//

a = 1;

while(a < 10){
  console.log('a is looping...', a);
  //a++;
  // a = a + 1;
  a += 2;
}

// for loop
//

for(var i = 0; i < 10; i++){
  console.log('i ===', i);
}