数组中最小数和最大数之差

Question

I'm stuck with the following assignment.

Code this function to take an array and return the difference between the smallest and the biggest number.

I've tried the following but keep getting an error. What am I doing wrong?

function differenceMinMax(array) {

     var arrayMin = array[0];
     var arrayMax = array [0];

     for  (var i=0; i <= array.length; i++) {

     if (array[i] < arrayMin) {
       arrayMin = array[i];
     } 
     if (array[i] > arrayMax) {
       arrayMax = array[i];
     }
    }

    return arrayMax - arrayMin;

    }

Answer 1

For your example to work, you could change your else to else if in your if/else clause. Also, change i <= array.length to i < array.length . Array's length is always numerically greater than its highest index (by 1), because in javascript indexes start from 0.

Here's how to do it with way less code, using ES6.

 const diff = (arr) => Math.max(...arr) - Math.min(...arr); const arr1 = [1, 2, 3, 4, 5]; const arr2 = [99, 0, -99]; console.log(diff(arr1)); // Logs 4 console.log(diff(arr2)); // Logs 198

Answer 2

1. array[array.length] is not exist so change

   i <= array.lenght

   to

   i < array.length

2. change

   else (array[i] > arrayMax)

   to

   else if(array[i] > arrayMax)

Answer 3

Replace your array and try this below code, It will work.

 var array = ['56', '1','9','0','20','2021']; var max = min= 0; for(var i=0; i<array.length; i++) { if(parseInt(array[i]) > parseInt(max)) { max = array[i] if(i == 0) min = max } else if(parseInt(array[i]) < parseInt(min)) { //console.log(max_2) min = array[i]; } } console.log("Maximum Number In Your Array "+ max) console.log("Manimum Number In Your Array "+min)

Answer 4

//We are going to sort the array, find the first & last elem of the array and perform the operation
var array = [9, 12, 14, 3, 5, 67];

var difference = differenceBetweenLargestAndSmallestElement(array);

console.log(difference);

function differenceBetweenLargestAndSmallestElement(array) {
  var sortedArray = array.sort(function(a, b) {
    return a - b
  });

  console.log(sortedArray);

  var firstElement = sortedArray[0];
  var lastElement = sortedArray[sortedArray.length - 1];

  return lastElement - firstElement;
}

Please find a fiddle - https://jsfiddle.net/Ayyub/zysp63fm/12/

Answer 5

try this: 'var arrayMin = 0; var arrayMax = 0;' instead of 'var arrayMin = array[0];var arrayMax = array [0]'