calculateMean.js

/** 
 *  -------------------------------------------------------
 *  Programming Question : Calculate Mean
 *  -------------------------------------------------------
**/


// Q. Write a function called calculateMean that takes an array of numbers as input and returns the mean(average) of those numbers.

//? Constraints:
//? The input array may contain positive and negative integers.
//? The input array may be empty. If its is empty, the function should return 0.

function calculateMean(arr) {
   if (arr.length === 0) {
      return 0
   }
   let result = arr.reduce((acc, curr) => acc + curr, 0);
   return result /arr.length;

   // let sum=0;
   // for(let i=0;i<arr.length;i++){
   //    sum += arr[i];
   // }
   // return sum / arr.length;
}

console.log(calculateMean([1, 2, 3, 4, 5]));
console.log(calculateMean([10, 20, 30]));
console.log(calculateMean([-1, 0, 1]));
console.log(calculateMean([]));