How you take input in Node.js / Javascript from file or stdin.
Difference between en1 and en2, changed 0 character(s)
How to get Input from stdin / input.txt in Node.js / JavaScript↵
==================↵

### Write this header code in the beginning of your js code↵

```↵
'use strict';↵

process.stdin.resume();↵
process.stdin.setEncoding('utf-8');↵

let inputString = '';↵
let currentLine = 0;↵

process.stdin.on('data', inputStdin => {↵
    inputString += inputStdin;↵
});↵

process.stdin.on('end', _ => {↵
    inputString = inputString.trim().split('\n').map(string => {↵
        return string.trim();↵
    });↵
    ↵
    main();    ↵
});↵

function readLine() {↵
    return inputString[currentLine++];↵
}↵

// thats all what you have to write to get input from stdin, using readLine.↵


// Main code runs in main();↵


function main() {↵
    const parameterVariable = readLine();↵
    const line2 = readLine();↵
    ↵
    greeting(parameterVariable);↵
    greeting(line2);↵
}↵

function greeting(parameterVariable) {↵
    console.log('Hello, World!');↵
    console.log(parameterVariable);↵
 // Write a line of code that prints parameterVariable to stdout using console.log:  ↵
}↵

```↵

### Testing Locally↵

paste your input in a text file input.txt↵

then↵
```↵
$ cat input.txt | node main.js↵
``` ↵
to view on console.↵
```↵
$ cat input.txt | node main.js > output.txt↵
```↵
to store the output in file.↵

##### you can also make a sublime-build file for this and then just press Ctrl+B ↵
  

History

 
 
 
 
Revisions
 
 
  Rev. Lang. By When Δ Comment
en8 English RohitKaushal 2020-01-26 11:58:34 742 Tiny change: 'ion.**\n\n\n\n\n###T' -> 'ion.**\n\n<hr>\n\n\n###T'
en7 English RohitKaushal 2020-01-03 09:18:55 3
en6 English RohitKaushal 2019-10-17 12:19:26 7 Tiny change: 'cb52.png) proof. :)\n ' -> 'cb52.png) :)\n '
en5 English RohitKaushal 2019-09-14 19:49:10 107
en4 English RohitKaushal 2019-09-14 19:37:07 159
en3 English RohitKaushal 2019-09-08 16:55:46 882 Tiny change: 'orces\n\n```readline()``` Reads on' -> 'orces\n\n`readline()` Reads on'
en2 English RohitKaushal 2019-09-06 23:08:34 0 (published)
en1 English RohitKaushal 2019-09-06 23:07:41 1459 Initial revision (saved to drafts)