JSFiddle - React, Tailwind, and code Playground

by Igor Cuckovic

JavaScript

let first = 1111;
let last = 9999;

function areAllOdd(num) {
	let result = true
  let arr = num.toString().split("")
  arr.forEach(d => {
  	if ((+d % 2 ) === 0) {
    	result = false
    }
  })
	return result
}

let resultsArr = [];

 for (let i = first; i <= last; i+=1) {
  if (areAllOdd(i)) {
  resultsArr.push(i)
  }
} 

let sum = resultsArr.reduce((acc,cur) => acc + cur, 0)

console.log(sum)