Answers for "how to sum all elements in an array js"

sum of all numbers in an array javascript

const arrSum = arr => arr.reduce((a,b) => a + b, 0)

addition of all elements of array in js

function addSum(array) { // call the function with your array parameter
   let solution = 0     
   for (let x = 0 ; x < array.length;x++) { // for loop
      solution = solution + array[x]
   }
   return solution
}