Why does this code showing error?

Question

The user can choose the color theme for the browser:
1. Light
2. Dark
3. Nocturne
4. Terminal
5. Indigo

You are given a program that takes
the number as input. Complete the program so that it will output to the console the theme according to input number.

Sample Input
2

Sample Output
Dark

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

Answer 1

Remove number 2 inside of readLine() function if you're trying debug you code on task problem, so if you trying to debug as a simple code remove readLine function your function should look like that 👇
var themeNumber = parseInt(prompt())

Answer 2

Gouhar Maqubool

JS course projects are running on Node JS so your code was right except 'light'

Answer 3

It's a task?

Answer 4

Thanks AJ i got the point where i done mistake there should "L" in uppercase 🙏

Answer 5

There is no readLine() method in standard JavaScript (ECMAscript).
If you actually read your error message, it tells you exactly this.

If you want to run this in a browser, you can use the prompt() function to take user input.

If you want to run it in node.js it is a bit more complicated, node does have a readline library (with lowercase L!!!) And you can see a pattern how to use it on Sololearn, here:
https://www.sololearn.com/Discuss/2953345/?ref=app

Answer 6

Gouhar Maqubool

You need to check spelling of 'light' in description

Answer 7

Félix Zamdamela

Yes it is a task in JS course

Answer 8

Its simple to do so
You need prompt to define a number which is enclosed by parseInt()..like that
var p;
function main(){
p = prompt("Enter theme")
var themeNumber = parseInt(p)
}
So you have to define a prompt like this Gouhar Maqubool

Answer 9

It will also work but the main problem was i entered lowercase L in "light" thats why it showing not defined else

Answer 10

It still showing refrenceError as promt is not define:(

Answer 11

Gouhar Maqubool

prompt and alert is not a function of Node JS

use readLine() to read input values

Answer 12

But it still showing wrong out as given the right input

Answer 13

I hope this works

Answer 14

But you are saying that it is an error of prompt not defined

Answer 15

Code is right expect "light".you should use "Light".
You can use a small code either.

function main() {
var themeNumber = parseInt(readLine(2) ,10);
var themes = [
"Light",
"Dark",
"Nocturne",
"Terminal",
"Indigo"
]

console.log(themes[themeNumber - 1] )

}

Answer 16

Try this: function main() {
var themeNumber = parseInt(readLine(), 10)

switch(themeNumber ){
case 1:
themeNumber = "Light";
break;
case 2:
themeNumber = "Dark";
break;
case 3:
themeNumber = "Nocturne";
break;
case 4:
themeNumber = "Terminal";
break;
case 5:
themeNumber = "Indigo";
}
console.log(themeNumber)
}