Course: Leaping Years. Please help!

#1

https://www.codecademy.com/en/courses/javascript-project-19/0/4

Oops, try again. false

var isLeapYear = function(year) {

  // Your code here
  return !(year%4)&&(year%100)||!(year%400);

};

var sum = 0;

for (i = 2000; i < 3000; i++) {
    if (isLeapYear(i)) {
        sum += 1;  
    }    
}

console.log(sum);

Hi guys,

I can not finish this course because I am stuck on the last exercise. I have tried various solutions and focused on the last (see code above). All the time I get the same error: Oops, try again. false.

I would be grateful for your help,
Mark K.

#2

there are two problems:

determine the number of leap years occurring from 2001 to 2999 AD

you start at 2000 instead of 2001, and the other issue:

Don't use console.log()

remove the console.log, otherwise it is not going to work

#3

@stetim94

Thank you for your advice!

I changed this code to:

var isLeapYear = function(year) {

  // Your code here
  return !(year%4)&&(year%100)||!(year%400);

};

var sum = 0;

for (i = 2001; i < 3000; i++) {
    if (isLeapYear(i)) {
        sum += 1;  
    }    
}

and the problem still exists!

Capture.JPG759x772 18.9 KB

#4

that is weird, i made sure i could pass with the code:

var isLeapYear = function(year) {

  // Your code here
  return !(year%4)&&(year%100)||!(year%400);

};

var sum = 0;

for (i = 2001; i < 3000; i++) {
    if (isLeapYear(i)) {
        sum += 1;  
    }    
}

before helping you. Maybe you need to refresh the page?

I have another tip for you, this courses are poorly maintained, you can also go to freecodecamp, they have great js challenges (and codewars of course)

#5

@stetim94

the same issue...

Could it be that the cause of the problem is the version of the browser?

#6

but i passed it:

Screenshot_2016-10-04_13-01-41.png662x566 25 KB

with your code. Maybe then try a different browser altogether?

#7

@stetim94

Could you tell me please what kind of browser are you using?

Thanks,
Mark

#8

i am just using firefox.

Maybe you should seriously consider freecodecamp, they have great js challenges which are maintained.

#9

@stetim94

You were absolutely right! :slight_smile:

The problem was in the browser and now it is resolved! Initially I used Google Chrome and my code could not be accepted by check. Then I followed your advice and tried another web browser (Mozilla Firefox) and now it works fine for me! :slight_smile:

Thank you for your help and I wish you a good day! :wink:

#10

i just suspected that chrome sends cached data to the server, causing a incorrect validation.