initial_value (optional) – supplied initial value.callback – The function to execute on every element in the array.array – The main array to run the reduce function on.reduced_result – A single value that is returned after completion.Let’s try to understand, what all arguments and variable do here? Var reduced_result = array.reduce(callback, initial_value) We can specify an initial value optionally Reduce() Method Syntax var reduced_result = array.reduce(callback) It’s returned value is assigned to the callback (the accumulator), whose value is remembered on each iteration throughout the array and ultimately becomes the final a single resulting value. Just like JavaScript map() method, it also runs a callback function for each element of an array. So what is reduce() method in JavaScript? How does it work? Where you should use JavaScript reduce() method in your program. JavaScript reduce() method tutorial is the topic, we are going to understand today.
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