add values of arry js code example

Example 1: pushing element in array in javascript

array = ["hello"]
array.push("world");

Example 2: js array sum

console.log(
  [1, 2, 3, 4].reduce((a, b) => a + b, 0)
)
console.log(
  [].reduce((a, b) => a + b, 0)
)