How to calculate the average value of php array

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Php array to find the average method: 1, use array_sum () to calculate the sum of all elements in the array, syntax "array_sum ($arr)"; 2, use count () to get the number of elements in the array, syntax "count ($arr)"; 3, use the "number of elements and / elements" statement to calculate the array average.

Operating environment of this tutorial: windows7 system, PHP7.1 version, DELL G3 computer

The method of calculating the average value of php Array

Realize the idea:

Calculate the sum of all the elements in the array

Gets the number of elements in the array, that is, the length of the array

Divide the element sum by the length of the array to calculate the average

Implementation method:

Use array_sum () to sum

Count the number of elements using count ()

Use the "/" operator to average, syntax "elements and / elements"

Implementation example:

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