How to find the average of three numbers in javascript

Method: 1. Use the " " operator to add the three numbers and assign them to the variable "sum". The syntax is "sum=value 1 value 2 value 3"; 2. Use "/" The operator adds the sum of three numbers and divides it by 3, and assigns it to the variable "ave". The syntax is "ave=sum/3"; 3. Output the value of the variable "ave".

The operating environment of this tutorial: windows7 system, javascript version 1.8.5, Dell G3 computer.

Javascript implements the average of three numbers

The average refers to the sum of all the data in a set of data divided by the set The number of data.

We only need to add the three numbers and then divide by 3.

For example, there are three numbers: 1, 2, 3, and their average is:

Implementation code:

var a,b,c,sum,ave;
a=1;
b=2;
c=3;
sum=a+b+c;
ave=sum/3;
console.log(ave);

This is If you know the specific number of data, how can you find the average if you don’t know?

We can use arrays.

      //数组求元素之和
        function getSum(arr) {
            var sum=0,ave=0,i=0;
            for(i=0;i<arr.length;i++) {
            // alert(arr);
               sum+=arr[i];
            } 
            return sum;
        }
        //求平均分 
        function getAve(arr) {
            var sum=0,ave=0,i=0;
            for(i=0;i<arr.length;i++) {
            // alert(arr);
               sum+=arr[i];
            } 
            ave=sum/arr.length;
            return ave;
        }
        //计算结果
        var arr=[1,2,3,4,5];
        var j=arr.length;
        // getSum(arr);
        alert(&#39;这&#39;+j+&#39;个数字为&#39;+arr+&#39;\n&#39;+&#39;这些数字的和为&#39;+getSum(arr)+&#39;\n&#39;+&#39;这些数字的平均值为&#39;+getAve(arr));

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