Read multiple input lines using javascript

Question

I'm trying to do some algorithmic problems using Node's library of read lines : readline. (Actually, It was proposed by the course).

The input code was :

var readline = require('readline');
var lineNumber = 0;

process.stdin.setEncoding('utf8');
var rl = readline.createInterface({
  input: process.stdin,
  terminal: false
});

rl.on('line', readLine);

function readLine (line) {
    // Do some work here.
}

The problem is to calculate the sum of n numbers. As input we have : 1. In the first line, the number of numbers for which we want to calculate the sum. 2. The second line will contain the "n" numbers seperated by spaces.

An example for an input would be : 5 1 4 8 7 9 The output in this case : 25

How can I do that with this library (I can do that with Java, C++, etc. But I don't know how to read multiple input lines using javascript)

Pradeep Palakurthi · Accepted Answer · 2016-08-04 16:00:04Z

var readline = require('readline');
var lineNumber = 0;
var NumOfNum;

process.stdin.setEncoding('utf8');
var rl = readline.createInterface({
  input: process.stdin,
  terminal: false
});

rl.on('line', readLine);
console.log("Provide number of Numbers to sum:");
function readLine (line) {
    if (lineNumber == 0) {
        if (!isNaN(parseInt(line))) {
            NumOfNum = parseInt(line);
            lineNumber++;
            console.log("Provide " + NumOfNum + " numbers sepearted by space to add: ");
        } else {
            console.log("Invalid Input");
        }
    } else {
        var sum = line.split(" ");
        if (sum.length != NumOfNum) {
            console.log("Given more/less than " + NumOfNum + " Try again");
        } else {
            sum = sum.reduce(function(a, b) {
              return (a*1) + (b*1);
            });
            console.log("Total: " + sum);
            process.exit();
        }
    }
}

Collectives™ on Stack Overflow

Read multiple input lines using javascript

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related