# Answers for "javascript reduce function"

12

javascript sum of array

``const sum = arr => arr.reduce((a, b) => a + b, 0);``
Posted by: Guest on July-03-2020
3

how to flatten array with reduce in javascript

``````let flattened = [[0, 1], [2, 3], [4, 5]].reduce(
function(accumulator, currentValue) {
return accumulator.concat(currentValue)
},
[]
)
// flattened is [0, 1, 2, 3, 4, 5]``````
Posted by: Guest on July-12-2020
38

javascript reduce

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

array.reduce(function(accumulator, currentValue) {
return accumulator + currentValue;
}, 0); // 36 + 25 + 6 + 15 = 82``````
Posted by: Guest on May-21-2020
1

javascript reduce

``````[3, 2.1, 5, 8].reduce((total, number) => total + number, 0)

// loop 1: 0 + 3
// loop 2: 3 + 2.1
// loop 3: 5.1 + 5
// loop 4: 10.1 + 8
// returns 18.1``````
Posted by: Guest on August-10-2021
8

how to use reduce in javascript

``````const sum = array.reduce((accumulator, element) => {
return accumulator + element;
}, 0);
// An example that will loop through an array adding
// each element to an accumulator and returning it
// The 0 at the end initializes accumulator to start at 0
// If array is [2, 4, 6], the returned value in sum
// will be 12 (0 + 2 + 4 + 6)

const product = array.reduce((accumulator, element) => {
return accumulator * element;
}, 1);
// Multiply all elements in array and return the total
// Initialize accumulator to start at 1
// If array is [2, 4, 6], the returned value in product
// will be 48 (1 * 2 * 4 * 6)``````
Posted by: Guest on January-04-2020
1

javascript reduce function

``````var numbers = [175, 50, 25];

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

function myFunc(total, num) {