reduce example mdn

Example 1: javascript reduce

var array = [36, 25, 6, 15];

array.reduce(function(accumulator, currentValue) {
  return accumulator + currentValue;
}, 0); // 36 + 25 + 6 + 15 = 82

Example 2: javascript reduce function

var numbers = [175, 50, 25];

document.getElementById("demo").innerHTML 
  = numbers.reduce(myFunc);

function myFunc(total, num) {
  
  return total - num;
}