sum in javascript

const arr = [1, 2, 3, 4];
const sum = arr.reduce((a, b) => a + b, 0);
// sum = 10const sum = arr => arr.reduce((a, b) => a + b, 0);[1, 2, 3, 4].reduce((a, b) => a + b, 0)

// Output: 10console.log(
  [1, 2, 3, 4].reduce((a, b) => a + b, 0)
)
console.log(
  [].reduce((a, b) => a + b, 0)
)const arrSum = arr => arr.reduce((a,b) => a + b, 0)1.500,25