#TIL (April 26th, 열두번째 이야기)

Web Development Bootcamp by Angela Yu

: javascript practice

1. Leap Year Challenge

• How to check whether a given year is a leap year
  
  : A year is a leap year if it is evenly divisible by 4;
  : except if that year is also evenly divisible by 100;
  : unless that year is also evenly divisible by 400.

function isLeap(year) {
    
if (year%4===0 && year%100!==0 || year%400===0) {
    return "Leap year.";
} 

else {
    return "Not leap year.";
}

2. FizzBuzz Game( 3,6,9게임과 비슷)

• Create an array with FizzBuzz Game
  : Any number divisible by three is replaced by the word fizz
  : Any number divisible by five by the word buzz
  : Numbers divisible by 15 become fizzbuzz

   for(var i=1; i<=100; i++) {
     
   if (i%15===0) { // put fizzbuzz if first as it reads from the front 
     console.log("fizzbuzz");
     
   } 
     else if (i%5===0) {
     console.log("buzz"); 
       
   } 
     else if (i%3===0) {
     console.log("buzz");  
   } 
     else {
     console.log(i);
   }
     
   }

  
  

3. Who is buying lunch (이름 랜덤 뽑기)

• Pick a random person
  : using array and math.random

   
  function whoPaying(names) {
       
          var names=["A","B","C","D","E"];
  
     	var whatNames= Math.floor(Math.random()*names.length);
       
     return (names[whatNames] +" is going to buy lunch today!");
  	}
  
  whoPaying(names);
  

  
  

4. 99 bottles challenge

• Creating repeated lyrics
  : using while to complete

function beer() {

    var number = 99;

    while (number >= 0) {

        var decrement = number--;

        if (decrement > 1) {

            console.log(decrement + " bottles of beer on the wall, " + decrement + " bottles of beer. Take one down and pass it around, " + (decrement - 1) + " bottles of beer on the wall.");   

        }

        else if (decrement === 1) {

            console.log(decrement + " bottle of beer on the wall, " + decrement + " bottle of beer. Take one down and pass it around, " + (decrement - 1) + " bottles of beer on the wall.");   

        }

        else (decrement === 0) {

            console.log("No a penny on me to buy more.");

        }

    }

}

beer();

5. Fibionachi challenge