Counting Cards how to do solve?

JavaScript
1

Tell us what’s happening:

help,why is it not work?

Your code so far


var count = 0;

function cc(card) {
  // Only change code below this line
  var answer="";
switch(card){
case 2:
case 3:
case 4:
case 5:
case 6:
answer = count;
count++;
break;
case 7:
case 8:
case 9:
answer=count;
break;
case 10:
case J:
case Q:
case K:
case A:
answer = count;
count -1;
break;
}
if (answer > 0){
return count + "Bet";
}else
return count + "Hold";
  
  return "Change Me";
  // Only change code above this line
}

// Add/remove calls to test your function.
// Note: Only the last will display
cc(2); cc(3); cc(7); cc('K'); cc('A');

Your browser information:

User Agent is: Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/74.0.3729.169 Safari/537.36.

Link to the challenge:
https://learn.freecodecamp.org/javascript-algorithms-and-data-structures/basic-javascript/counting-cards

2

In your switch statement, the cases for J, Q, K and A should be wrapped in quotes (like 'J', etc.). Fixing them will not yet pass though.

3

have fix ‘J’,but can’t work.I don’t why?
// running tests

Cards Sequence 2, 3, 4, 5, 6 should return 5 Bet

Cards Sequence 7, 8, 9 should return 0 Hold

Cards Sequence 10, J, Q, K, A should return -5 Hold

Cards Sequence 3, 7, Q, 8, A should return -1 Hold

Cards Sequence 2, J, 9, 2, 7 should return 1 Bet

Cards Sequence 2, 2, 10 should return 1 Bet

Cards Sequence 3, 2, A, 10, K should return -1 Hold

// tests completed

4

  • What’s the use you have of answer? You write count = answer but then you change count so you can’t evaluate answer anymore as it is not equal to count anymore

  • count -1 is not how you lower the value of a variable by one

  • You are missing a space in your output between count and the word you need to return

5

I have delete answer and count -1,but can’t work. :confounded:

6

Post again your code, so we can see what you have changed

7

https://learn.freecodecamp.org/javascript-algorithms-and-data-structures/basic-javascript/counting-cards

8

Hint
Do NOT reset count to 0 when value is 7, 8, or 9.
Do NOT return an array.
Do NOT include quotes (single or double) in the output.
see it,don’t single or double,and count to 0 when value 7.8.9.
so how to solve?

9

That’s not your code , if I don’t see your code I don’t know what’s wrong

10

https://learn.freecodecamp.org/javascript-algorithms-and-data-structures/basic-javascript/counting-cards
I try change it, but can’t work.

11

I need your code - not the link to the challenge

Your current code

Like in the first post you included your code, you need to do it again

Click the </> preformatted text button and paste your code

12

Tell us what’s happening:

@ieahleen why can’t work??

Your code so far


var count = 0;

function cc(card) {
  // Only change code below this line
  switch(card) {
    case 2: case 3: case 4: case 5: case 6:
    return "5 Bet";
    break;
    case 7: case 8: case 9:
    return "0 Hold";
    break;
    case 10: case J: case Q: case K: case A:
    return "-5 Hold";
    break;
    case 3: case 7: case Q: case 8: case A:
    return "-1 Hold";
    break;
    case 2: case J: case 9: case 2: case 7:
    return "1 Bet";
    break;
    case 2: case 2: case 10:
    return "1 Bet";
    break;
    case 3: case 2: case A: case 10: case K:
    return "-1 Hold";
    break;
  }
  if (count > 0) {
    return count + "Bet";
  } else {
    return count + "Hold";
  }
  
  return "Change Me";
  // Only change code above this line
}

// Add/remove calls to test your function.
// Note: Only the last will display
cc(2); cc(3); cc(7); cc('K'); cc('A');

Your browser information:

User Agent is: Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/74.0.3729.169 Safari/537.36.

Link to the challenge:
https://learn.freecodecamp.org/javascript-algorithms-and-data-structures/basic-javascript/counting-cards

13

You have changed anything - you were more near it before

You are not updating the value of count… you are just trying to get the correct result for the tests - well, it will not work: your function accepts one card, count needs to be updated depending on the card value and then depending on count you return Bet or Hold

Your function is just returning 5 Bet, 0 Hold or -5 Hold, no other values can be returned from your function, and it is not updating count

14

I’m still confused,if write switch(card) { case 2: case 3: case 4: case 5: case 6: count++; break; case 7: case 8: case 9: count; break; case 10: case ‘J’: case ‘Q’: case ‘K’: case ‘A’: count–; break; }
if (count > 0) { return count + “Bet”; } else { return count + “Hold”; }
I don’t think it will work??

15

You are missing a space on the return statement (you are returning 5Bet instead of 5 Bet)

16

still can’t work, confused.

17

Have you tried changing your return statement to add the space?

18

yes, I have try change ti, but can’t work.Tomorrow night I will try challenge again.:pensive::sleepy:

19

In what way have you tried adding the space? What is now the return statement?

20

have solve it.it is can work.I just see the Youtube try to do.