take user input from console in nodejs iteratively?

Question

How to take input from console in a loop ?

Let us suppose node promt asks how many students are in a class? after this user enter 5, then there should be a promt asking 5 times "enter their name one by one", and all name has to be stored in an array

Something like prompt would work for this.. (has more than double the amount of weekly downloads on NPM versus readline-sync).. — Matt Oestreich
– Matt Oestreich, Commented Sep 15, 2019 at 16:26

ashwintastic · Accepted Answer · 2019-09-15 17:34:13Z

1

Try this

const readline = require('readline');
const rl = readline.createInterface({
    input: process.stdin,
    output: process.stdout
});

let n;
let array = []

function mainfunction() {
    if( n == array.length){
        console.log("your output: ",  array)
        rl.close()
    }
    else{
        rl.question('enter student name one by one \n', (name) => {
            array.push(name)
            mainfunction()
        })
    }
 }

rl.question('enter the number of students ', (answer) => {
    n = answer
    mainfunction()
});

answered Sep 15, 2019 at 17:34

ashwintastic

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Comments

Shubham Dixit · Accepted Answer · 2019-09-15 16:10:28Z

1

You can do something like this with the readline-sync package

 var readline = require('readline-sync');

    let num = readline.question("how many students are in a class ?");
    let names=[];
    for(let i=0;i<=num;i++)
    {
      let name = readline.question("Enter Name?");
      names.push(name);
    }
    console.log(names);

Working repl-https://repl.it/repls/LightyellowEvenBusinesses

answered Sep 15, 2019 at 16:10

Shubham Dixit

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2 Comments

shaan Over a year ago

can it work in online challenges problem, like hackers earth etc etc

Shubham Dixit Over a year ago

It should ,I guess try it :)

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