Question

Using a text editor or IDE, copy the following list of names and grade scores and save it as a text file named scores.txt:
Name, Score
Joe Besser,70
Curly Joe DeRita,0
Larry Fine,80
Curly Howard,65
Moe Howard,100
Shemp Howard,85
Create a JavaScript program of the files that display high, low, and average scores based on input from scores.txt. Verify that the file exists and then use string functions/methods to parse the file content and add each score to an array. Display the array contents and then calculate and display the high, low, and average score. Format the average to two decimal places. Note that the program must work for any given number of scores in the file. Do not assume there will always be six scores and use Node Js as IDE.

Answer 1

If you have any problem with the code feel free to comment.

Program

const fs = require('fs');

//for storing student details

let studentDetails = {};

fs.readFile('scores.txt', 'utf-8', (err, data) => {

  //split data in by new line

  const rawDetails = data.split(/\r?\n/);

  for (let i = 0; i < rawDetails.length; i++) {

    //splitting the data by comma

    let ar = rawDetails[i].split(',');

    studentDetails[i] = { name: ar[0], score: parseInt(ar[1]) };

  }

  let sum = 0;

  let high = studentDetails[0].score;

  let low = studentDetails[0].score;

  for (let i = 0; i < rawDetails.length; i++) {

    //calculating sum

    sum += studentDetails[i].score;

    //finding high score

    if (high < studentDetails[i].score) high = studentDetails[i].score;

    //finding low score

    if (low > studentDetails[i].score) low = studentDetails[i].score;

  }

  //calculating avg

  const avg = sum / rawDetails.length;

  //printing the result

  console.log(`High score: ${high}`);

  console.log(`Low score: ${low}`);

  console.log(`Average score: ${avg.toFixed(2)}`);

});

Output