Java Script: Bina Permainan Rock, Paper, Scissors

Latihan membina game mudah.

- Declare a variable called userChoice.
- Make the variable equal to the answer we get by asking the user "Do you choose rock, paper or scissors?"

var userChoice = prompt("Do you choose rock, paper or scissors?");

- Under your previous code, declare a variable called computerChoice and make it equal to Math.random().

- Print out computerChoice so you can see how Math.random() works. This step isn't needed for the game - just useful for learning!

var userChoice = prompt("Do you choose rock, paper or scissors?");
computerChoice=Math.random();
console.log (computerChoice);

We have computerChoice but it now equals a random number between 0 and 1. We need to somehow translate this random number into a random choice of rock, paper, or scissors. How do we do this?!

-If computerChoice is between 0 and 0.33, make computerChoice equal to "rock".

-If computerChoice is between 0.34 and 0.66, make computerChoice equal to "paper".

-If computerChoice is between 0.67 and 1, make computerChoice equal to "scissors".

var userChoice = prompt("Do you choose rock, paper or scissors?");
computerChoice=Math.random();
console.log (computerChoice);
if ((computerChoice >= 0) && (computerChoice <=0.33))
{
    console.log (computerChoice);
    console.log ("rock");
}
else if ((computerChoice >= 0.34) && (computerChoice <=0.66))
{
     console.log (computerChoice);
    console.log ("paper");
}
else
{
     console.log (computerChoice);
    console.log ("scissors");
}

-We carried over the code from the previous section, but it is a comment. Leave it there for now.

-Below the comment, declare a function called compare.

It takes two parameters, choice1 and choice2.

-Inside the function, write an if statement. If choice1 === choice2, then return "The result is a tie!"

var userChoice = prompt("Do you choose rock, paper or scissors?");
var computerChoice = Math.random();
if (computerChoice < 0.34) {
    computerChoice = "rock";
} else if(computerChoice <= 0.67) {
    computerChoice = "paper";
} else {
    computerChoice = "scissors";
} console.log("Computer: " + computerChoice);

var compare = function(choice1,choice2){
 if (choice1===choice2) {
     return "The result is a tie!";
     }
};

compare(computerChoice,userChoice);

Computer: rock
"The result is a tie!"

What if choice1 is "rock"? Given choice1 is "rock",

a. if choice2 === "scissors", then "rock" wins.

b. if choice2 === "paper", then "paper" wins.

How do we structure this? It's a bit different from what we have already seen. We will first have an if statement. And then the code inside that if statement will be... another if statement!

var userChoice = prompt("Do you choose rock, paper or scissors?");
var computerChoice = Math.random();
if (computerChoice < 0.34) {
    computerChoice = "rock";
} else if(computerChoice <= 0.67) {
    computerChoice = "paper";
} else {
    computerChoice = "scissors";
} console.log("Computer: " + computerChoice);

var compare = function(choice1,choice2){
 if (choice1===choice2) {
     return "The result is a tie!";
     }
     else if (choice1=="rock")
     {
         if (choice2 ==="scissors")
         return "rock wins";
         else
         {
             return "paper wins"
         }
     }
};

compare(computerChoice,userChoice);

SIAP!