Printing numbers from 1-100 then storing it in a txt file-CodePudding

So I made a simple code to print numbers from 1 to 100 and it works just fine, but I want to store every number in a text file, so every number from 1 to 100 would be stored in its own line, Issue I have is that its only storing the last number

const fs = require('fs')

for(var i = 1; i < 100; i  ){
let data = `(1, ${i}, 0, 'Game Channel ${i}', '1'),`

fs.writeFile('Output.txt', data, (err) => {
    if (err) throw err;
})}

For example in txt file output would be:

(1, 1, 0, 'Game Channel 1', '1'),
(1, 2, 0, 'Game Channel 2', '1')

CodePudding user response：

Write at the end, since you're be overwriting it on every subsequent write.

const fs = require('fs');

let data = "";

for (let i = 1; i <= 100; i  ){
    data  = `(1, ${i}, 0, 'Game Channel ${i}', '1'),\n`;
}

fs.writeFile('Output.txt', data, (err) => {
    if (err) throw err;
});

CodePudding user response：

You can use createWriteStream to open the file, and then write to it asynchronously.

const fs = require('fs');

async function main() {
  const ws = fs.createWriteStream('output.txt');
  for (let i = 1; i < 100; i  ) {
    let data = `(1, ${i}, 0, 'Game Channel ${i}', '1'),\n`
    await ws.write(data);
  }
}
main();

CodePudding user response：

First build whole combined string and then write to file.

const fs = require('fs');

const data = Array.from({length: 100}, (_, i) => `(1, ${i 1}, 0, 'Game Channel ${i 1}', '1'),\n`).join('')

fs.writeFile('Output.txt', data, (err) => {
    if (err) throw err;
});