Switch Case question - Code error

Question

Hey, I just tried to solve a sololearn question but it won't work. I need to to several cases for giving out some text. If I don't change the first sentence given by sololearn (you can see them I commented it) then I get a massive error Message, so I changed it to just readline (). Now I got the problem, that It show no output. So for example if sololearn types in 1 it shows no output. Could you explain to me my error?

function main() {
var themeNumber = readLine()
// var themeNumber = parseInt(readLine(), 10)
/*
1 - Light
2 - Dark
3 - Nocturne
4 - Terminal
5 - Indigo
*/
// Your code here
switch (themeNumber) {
case 1:
document.write("Light");
break;
case 2:
document.write("Dark");
break;
case 3:
document.write("Nocturne");
break;
case 4:
document.write("Terminal");
break;
case 5:
document.write("Indigo");

}

}

Answer 1

Dennis Lier , try to change everywhere document.write with console.log.

Answer 2

var themeNumber = parseInt(readLine(), 10) ✔️

var themeNumber =readLine ()
//var themeNumber=
parseInt(readLine(),10)❌

// is used for comment and the code after // will be ignored.

According to the people above said ,Use console.log instead of document.write b.coz we wanna show o/p in console not in web

Answer 3

readLine() returns string by default. You can use parseInt(readLine(), 10) to convert it to an integer.
Or you can change your cases to strings
case "1":
case "2":
...

Answer 4

I wonder if it's the missing break that causes the error in case 5

Answer 5

TheWh¡teCat 🇧🇬 and Nick thank you for the fast answer, both options don't work here for me. Guess something different is wrong. It show absolutely no error in the console, just no output

Answer 6

TheWh¡teCat 🇧🇬 as mentioned I commented the second line because it gave me an error in the console, so I tried the option for strings

Answer 7

Myo Thuzar I commented the second line on purpose, cause it caused an error in the console

Answer 8

Myo Thuzar TheWh¡teCat 🇧🇬 Simba

function main() {
//var themeNumber = readLine()
var themeNumber = parseInt(readLine(), 10)
/*
1 - Light
2 - Dark
3 - Nocturne
4 - Terminal
5 - Indigo
*/
// Your code here
switch (themeNumber) {
case 1:
document.write("Light");
break;
case 2:
document.write("Dark");
break;
case 3:
document.write("Nocturne");
break;
case 4:
document.write("Terminal");
break;
case 5:
document.write("Indigo");

}

}
This is the new code, where I uncommented the integer line. Now the problem is, that the console tells me that "document" in the first case from "light" is not defined

Answer 9

Dennis Lier , replace it with console.log as I mentioned previously.

Answer 10

Dennis Lier

Did you call the function main()?

Answer 11

Dennis Lier , then read themeNumber as integer (uncomment the second line in the function and remove the first line).

Answer 12

TheWh¡teCat 🇧🇬 it worked just fine lol.. could you explain to me why document.write led to a error in this case?
And thank you so much!

Answer 13

Dennis Lier , read again the comment of 「ＨＡＰＰＹ ＴＯ ＨＥＬＰ」

Answer 14

TheWh¡teCat 🇧🇬 I'm really new in learning JavaScript I don't really know what function main is

Answer 15

Nice

Answer 16

i did have the same problem why sololearn teach us in the leson with document.write and in the problems the expect us to use console.log when they dint teach us that?

Answer 17

Fernando Enrique Ametller Medina This was exactly my question. Sometimes it's just not understandable what they want and how they check