What is the function of summing and averaging of php arrays?

There is an array summation function "array_sum()" in PHP, which can calculate the sum of all elements in a one-dimensional array; but there is no function that directly calculates the average of an array. If you want to find the average value of a PHP array, you can use the array_sum(), count() functions and the "/" operator. Methods: 1. Use the "array_sum($arr)" statement to calculate the sum of the array elements; 2. Use "count( $arr)" statement to calculate the array length; 3. Use the "array elements and/array length" statement to find the average.

The operating environment of this tutorial: Windows 7 system, PHP version 8.1, DELL G3 computer

Array summation is provided in php Function "array_sum()", but does not provide a function to directly find the average of an array.

• ##Use

  array_sum($arr)You can calculate the sum of all elements in a one-dimensional array

<?php  
header("content-type:text/html;charset=utf-8");
$arr = array(1,2,3,4,5,6,7,8,9,10); 
var_dump($arr);
$sum=array_sum($arr);
echo "数组的和为：".$sum;
?>

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So what do you do if you want to ask for the average value of a PHP array?

• Use array_sum() to calculate the sum of array elements;

• Use count() to calculate the array length;

• Use the "array elements and/array length" statement to find the average

<?php  
header("content-type:text/html;charset=utf-8");
$arr = array(1,2,3,4,5,6,7,8,9,10); 
var_dump($arr);
$sum=array_sum($arr);
echo "数组的和为：".$sum."<br>";
$len=count($arr);
echo "数组长度：".$len."<br>";
$average=$sum/$len;
echo "数组平均值：".$average."<br>";
?>

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