How to find the maximum value of an array in javascript

Javascript method to find the maximum value of an array: 1. Declare a variable max that holds the largest element; 2. Traverse the array and compare each array element inside with max; 3. When the array element is greater than max, Store the array elements in max; 4. Output max.

The operating environment of this article: windows7 system, javascript version 1.8.5, DELL G3 computer

How to find the maximum value of an array with javascript?

JavaScript finds the maximum value of the elements in the array

Requirements:

Find the maximum value in the array [2,6,1,77,52,25,7] maximum value.

Implementation idea:

• Declare a variable max that holds the largest element
  

• The default maximum value max is defined as The first element in the array arr[0]

• Traverse the array and compare each array element with max

• If If this array element is greater than max, store this array element in max, otherwise continue to the next round of comparison

• Finally output this max

Code implementation:

var arr = [2, 6, 1, 77, 52, 25, 7, 99];
var max = arr[0];
for (var i = 1; i < arr.length; i++) {
    if (max < arr[i]) {
        max = arr[i];
    }
}
console.log(max);

Output result:

99

---

Function version:

Code implementation:

// 利用函数求数组 [3, 77, 44, 99, 143] 中的最大数值。
function getArrMax(arr) { // arr 接受一个数组  arr =  [3, 77, 44, 99, 143]
    var max = arr[0];
    for (var i = 1; i < arr.length; i++) {
        if (max < arr[i]) {
            max = arr[i];
        }
    }
    return max;
}
// getArrMax([3, 77, 44, 99, 143]); // 实参是一个数组送过去
var re = getArrMax([3, 77, 44, 99, 143]);
console.log(re);

Output result:

143

---

Function arguments:

Code implementation:

function getMax() {
    var max = arguments[0];
    for (var i = 1; i < arguments.length; i++) {
        if (max < arguments[i]) {
            max = arguments[i];
        }
    }
    return max;
}
console.log(getMax(1, 2, 3));
console.log(getMax(1, 2, 3, 4, 5));
console.log(getMax(11, 2, 34, 444, 5, 100));

Output result:

3

5

444

Recommended learning: "javascript basic tutorial"

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