CreateAnArrayOfPrefixSums.js

// Write a JavaScript program to create an array of prefix sums of the given array.

// In computer science, the prefix sum, cumulative sum, inclusive scan, or simply scan of a sequence of numbers x0, x1, x2, ... is a second sequence of numbers y0, y1, y2, ..., the sums of prefixes of the input sequence:
// y0 = x0
// y1 = x0 + x1
// y2 = x0 + x1+ x2
// ...

const prompt = require("prompt-sync")();

console.log("Enter Array Size : ");
var size = parseInt(prompt());

var arr = [];

console.log("Enter Array Elements : ");
for (let i = 0; i < size; i++) {
  console.log(`[${i}] : `);
  var elem = parseInt(prompt());
  arr.push(elem);
}

var newArr = [];

for (let i = 0; i < arr.length; i++) {
  newArr[i] = 0;
  for (let j = 0; j < i + 1; j++) {
    newArr[i] = newArr[i] + arr[j];
  }
}

console.log(newArr);