n8n reduce()
Reduces an array to a single value, such as a total, by carrying an accumulator through every element.
Syntax
array.reduce((acc, item) => newAcc, initial)
Example
$json.items.reduce((s, i) => s + i.price, 0)
Result: 35
Equivalent in Make.com
sum() — sum(array) / sum(value1; value2; ...)