While loop in node.js

Question

I am trying to convert a C# snippet for a simple while loop to a JavaScript solution. The C# code asks for a input, prints the output, and as long as the input is not 0, continues the question.

For the JavaScript solution, I am using VS Code and the integrated terminal for the JS output using node. As I understand, when using node and the readline method, I can't use while loops? But resort to if and switch case?

This is my C# code:

    public void WriteNumbers(int i)
    {
        while(i != 0)
        {
            PrintWriteNumbers();
            break;
        }
    }

    public void PrintWriteNumbers()
    {
       Console.WriteLine("Provide a number: ");
       WriteNumbers(int.Parse(Console.ReadLine()));
    }

Can I get this kind of behavior in the terminal with JavaScript or create a html page?

I started to use a html output for my JavaScript, this is code, but it is incomplete:

<h2>JavaScript While Loop</h2>

<p id="demo"></p>

<script>
let text = ""
let num
        while (num !== 0) {
            num = parseInt(prompt("write a number"))
            text += "<br>The number is " + num
            break
        }
        document.getElementById("demo").innerHTML = text
</script>

It does take in a number and prints it to the screen. What I want to actually do is to print the output to the p tag, and if the input is not 0, initiate the prompt again for a new input, and exit the prompt when it is 0.

score 2 · Accepted Answer · answered Dec 10 '20 at 08:51

2

Your while loop should be written like this,

while (num !== 0) {
    num = parseInt(prompt("write a number"))
    if(num === 0) break;
    text += "<br>The number is " + num
}

answered Dec 10 '20 at 08:51

Md Sabbir Alam

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thanks a lot :) But is it correct, that in node, using readline.. while loops don't work properly? – user2371684 Dec 10 '20 at 09:03
1

This link might be useful for you, https://stackoverflow.com/questions/24464404/how-to-readline-infinitely-in-node-js – Md Sabbir Alam Dec 10 '20 at 09:07

While loop in node.js

1 Answers1