How do I calculateAverage?

Question

I need to create a function in Javascript that is called calculateAverage which accepts arrays of numbers. The function should return the average in the array. If the array is empty, return 0.

I am new to coding and have only studied python.

int calculateAverage(int numbers_count, int* numbers) {
calculateAverage([50, 21, 80])
calculateAverage([30, 39, 58, 11])
calculateAverage([200])
calculateAverage([])

Answer 1

this can be a solution:

 function calculateAverage(arr) {
  const sum = arr.reduce((acc, curr) => acc + curr, 0)
  return sum / arr.length
}

const arr = [5,10,1,5,20,50,30,25];

const average = calculateAverage(arr);
console.log(average)

Answer 2

you can do that like this...

function calculateAverage(arr) {
  const rslt = arr.reduce((a, b) => a + b, 0) / arr.length;
  return 0 === ~~rslt ? 0 : rslt;
}

console.log(calculateAverage([30, 39, 58, 11]));

Answer 3

You have to put your image in the folder man/figures and type such an Roxygen code:

#' \if{html}{Here is my figure:
#'
#'   \out{<div style="text-align: center">}\figure{myfigure.png}{options: style="width:750px;max-width:75\%;"}\out{</div>}
#'
#' }
#' \if{latex}{Here is my figure:
#'
#'   \out{\begin{center}}\figure{myfigure.png}\out{\end{center}}
#'
#' }