How to sum every number in an array of numbers.
Using the ES2015 syntax it can be done as follows: let numbers = [10, 42, 5, 87, 61, 34, 99]; let sum = numbers.reduce((a,b) => a + b); where the reduce signature is Array.prototype.reduce(accumulator, element, callback, startingValue) alternatively a for loop could be used.
MC
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