8/9 what's wrong? what does it mean by arguments and how to code them


#1

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=== "scissor")
{
return ("rock wins");
}
else
{
return ("paper wins");
}
}
else if (choice1 === "paper")
{
if (choice2 ==="rock")
{
return ("paper wins")
}
else
{
return ("scissors wins")
}
else if (choice1 === "scissors")
{
if (choice2 === "paper")
{
return("scissors wins")
}
else
{
return("rock wins")
}
}
};
compare(userChoice,computerChoice)


#2

You are missing one closing bracket and a few semicolons. Take a look at your code nice and slow from top to bottom, remember when you have to use a semicolon to end a line and when you don't. Then use indentation to detect the missing closing bracket.

Everything that is missing is from this block of code:

else if (choice1 === "paper")
        { 
            if (choice2 ==="rock")
            {
            return ("paper wins")
            }
            else
            {
            return ("scissors wins")
            }
        else if (choice1 === "scissors")
        {
            if (choice2 === "paper")
            {
            return("scissors wins")
            }
            else
            {
            return("rock wins")
            }
        }
    };

#3

@alexmisanchez,

Please re-edit your Post

  • leave one blank-line above of your code
  • select your code in the Post
  • then =click= on the </>-symbol-of-this-editor

Your code will then be in a pre-code state
and you will be able to make/present the proper indentations.

or even better use
= http://discuss.codecademy.com/t/using-backticks-to-format-your-code/3697


#4

@alexmisanchez,

Please read
http://www.codecademy.com/forum_questions/559dcb4be39efe550f00006b
and concentrate on:

  • the creation of the compare function
  • the truth-table
  • the build of the IF ELSE-IF statement structure as part of the compare FUNCTION-BODY
  • the execution of the compare function (keeping in mind that the return statement is used )

the FUNCTION talk

var myFunc = function( param1, param2) {
       //Begin of  anonymous FUNCTION-BODY
       //VARIABLE -myFunc- has an -anonymous function- assigned
       //this -anonymous function- has 2 PARAMETERS param1 and param2
       //param1 and param2 PARAMETERS are used 
       //as -local- VARIABLES throughout the FUNCTION-BODY

      console.log( param1 + " and " + param2 ) ;

      //End of anonymous FUNCTION-BODY
};

If you want to call/execute the anonymous function
you will have to add a pair of parentheses to the variable myFunc
like
myFunc();
As the anonymous function was defined
as having 2 parameters
you have to provide 2 arguments
in our case 2 string VALUES "Alena" and "Lauren"
like
myFunc("Alena","Lauren");

some quotes from the outer-world:

**argument is the value/variable/reference being passed in,
parameter is the receiving variable used within the function/block**

OR

**"parameters" are called "formal parameters",
while "arguments" are called "actual parameters".**

+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
++++ function with 1 parameter using return-statement

var myFunction = function( param1 ) {
       //Begin of FUNCTION-BODY
       //myFunction =function= has 1 PARAMETER param1
       //this param1 PARAMETER is used as a -local- VARIABLE
       //throughout the FUNCTION-BODY

      return param1;

      //End of FUNCTION-BODY
      };

you have defined a myFunction function
which takes 1 parameter param1
this param1 parameter is used
as a variable throughout the FUNCTION-BODY.

If you want to call/execute this myFunction function
and this myFunction function was defined
as having 1 parameter param1
you will have to provide 1 argument
in our case a "number VALUE" 4
myFunction( 4 );

some quotes from the outer-world:

**argument is the value/variable/reference being passed in,
parameter is the receiving variable used within the function/block**

OR

**"parameters" are called "formal parameters",
while "arguments" are called "actual parameters".**

============================================

As you are using the return-statement in your myFunction function
you will only get a return-value no-display.
You can however capture this return-value in a variable
and then use the console.log()-method to do a display.

var theResult = myFunction( 4 );
console.log( theResult );

OR directly

console.log( myFunction( 4 ) );

#5

i was able to get it finally thank you!


#6

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

#7

@alexmisanchez,

Please read the =coding conventions=
= http://javascript.crockford.com/code.html
for instance the IF ELSE statement structure