Javascript Quiz: How well do you know reduce() method in JS
Are you ready for another code challenge? Join me in this video as you test your coding knowledge with the simple quiz questions.
Don't forget to make your guess in the comments below.
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Answer OPTION: B) 15
Explanation:
The code uses the reduce() method on the numbers array to calculate the sum of its elements.
The reduce() method takes a callback function that is applied to each element of the array, along with an initial value of the accumulator (in this case, 0).
The callback function receives two parameters: the accumulator (total) and the current element of the array (num).
In each iteration, the callback function adds the current element num to the accumulator total.
The reduce() method returns the final value of the accumulator after iterating over all elements of the array.
In this case, the callback function performs the addition total + num for each element of the array, resulting in the sum of 1 + 2 + 3 + 4 + 5, which is 15.
Hence, the output will be 15.