Snippits from Chapter 4 quizzes

JSReview-UdacityIntroJSChap4

# Snippits from Chapter 4 quizzes

JSReview-UdacityIntroJSChap4 --ChangeWhiletoFor

/*
 * Programming Quiz: Changing the Loop (4-4)
 */

// rewrite the while loop as a for loop
/*var x = 9;
while (x >= 1) {
    console.log("hello " + x);
    x = x - 1;
}*/
for (var x= 9; x >= 1; x--){
    console.log("hello " + x);
}

JSReview-UdacityIntroJSChap4- beer on the wall

/*
 * Programming Quiz: 99 Bottles of Beer (4-2)
 *
 * Use the following `while` loop to write out the song "99 bottles of beer".
 * Log the your lyrics to the console.
 *
 * Note
 *   - Each line of the lyrics needs to be logged to the same line.
 *   - The pluralization of the word "bottle" changes from "2 bottles" to "1 bottle" to "0 bottles".
 */

var num = 99;

while (num > 0) {
    // check value of num
    if (num > 2){
        // print lyrics using num
        console.log(num + " bottles of beer on the wall! " + num +
        " bottles of beer! Take one down, pass it around... " + (num-1) +
        " bottles of beer on the wall!");
    }
    // don't forget to check pluralization on the last line!
    else if (num === 2){
                console.log(num + " bottles of beer on the wall! " + num +
        " bottles of beer! Take one down, pass it around... " + (num-1) +
        " bottle of beer on the wall!");
    }
    else{
        console.log(num + " bottle of beer on the wall! " + num +
        " bottle of beer! Take one down, pass it around... " +
        (num-1) +" bottles of beer on the wall!");
    }
    // decrement num
    num--;
}

JSReview-UdacityIntroJSChap4- CountdownLiftoff

/*
 * Programming Quiz: Countdown, Liftoff! (4-3)
 * 
 * Using a while loop, print out the countdown output above.
 */

var x = 60;
while(x >= 0 ){

    switch(x){
    case 50:
        console.log("Orbiter transfers from ground to internal power");
        break;
    case 31:
        console.log("Ground launch sequencer is go for auto sequence start");
        break;
    case 16:
        console.log("Activate launch pad sound suppression system");
        break;
    case 10:
        console.log("Activate main engine hydrogen burnoff system");
        break;
    case 6:
        console.log("Main engine start");
        break;
    case 0:
        console.log("Solid rocket booster ignition and liftoff!");
        break;
    default:
        console.log("T-"+ x + " seconds");
    }
    x--;
}

JSReview-UdacityIntroJSChap4- FactorialForLoop

/*
 * Programming Quiz: Factorials (4-7)
 */

var solution = 1;
for(x = 12; x > 0; x--){
        solution *= x;
}
console.log(solution);

JSReview-UdacityIntroJSChap4- FindMySeat

/*
 * Programming Quiz: Find my Seat (4-8)
 * 
 * Write a nested for loop to print out all of the different seat combinations in the theater.
 * The first row-seat combination should be 0-0 
 * The last row-seat combination will be 25-99
 * 
 * Things to note: 
 *  - the row and seat numbers start at 0, not 1
 *  - the highest seat number is 99, not 100
 */

// Write your code here
for (var i = 0; i < 26; i++){
    for (var j = 0; j < 100; j++){
        console.log(i +"-" + j);
    }
}

JSReview-UdacityIntroJSChap4-FizzBuzz

/*
 * Programming Quiz: FizzBuzz (4-1)
 */

var x = 1;

while (x <=20) {
    if (x % 15 === 0){
        console.log ("FizzBuzz");
    }
    else if (x % 5 === 0){
        console.log("Buzz");
    }
    else if ( x % 3 === 0){
        console.log("Fizz");
    }
    else{
        console.log(x);
    }
    
    x++;
}