# JavaScript: Mean of all digits of a number

## JavaScript Math: Exercise-82 with Solution

Write a JavaScript program to calculate the mean of all the digits of a given number.

What is a Mean?
In mathematics, the mean represents the simple average of two or more numbers. There are several methods available for computing the mean of a set of numbers, including the arithmetic mean method, which uses the sum of the numbers in the series, and the geometric mean method, which is the average of a set of products.

Test Data:
(11) -> 1
(66) -> 6
(336) -> 4
(444) -> 4
(1151) -> 2

Sample Solution:

JavaScript Code:

``````/**
* Function to calculate the mean of all digits of a number.
* @param {number} n - The input number.
* @returns {number} - The mean of all digits of the input number.
*/
function test(n) {
// Convert the absolute value of n to a string and split it into an array of characters
let arr_str = String(Math.abs(n)).split('');
// Reduce the array of characters to the sum of their numeric values and divide by the number of digits
return arr_str.reduce((a, b) => a + Number(b), 0) / arr_str.length;
}

// Test cases
// Assign value to n
n = 11;
// Print the value of n
console.log("n = " + n);
// Calculate the mean of all digits of the said number
console.log("Mean of all digits of the said number: " + test(n));
// Repeat the above steps for different values of n
n = 66;
console.log("n = " + n);
console.log("Mean of all digits of the said number: " + test(n));
n = 336;
console.log("n = " + n);
console.log("Mean of all digits of the said number: " + test(n));
n = 444;
console.log("n = " + n);
console.log("Mean of all digits of the said number: " + test(n));
n = 1151;
console.log("n = " + n);
console.log("Mean of all digits of the said number: " + test(n));
```
```

Output:

```n = 11
Mean of all digits of the said number: 1
n = 66
Mean of all digits of the said number: 6
n = 336
Mean of all digits of the said number: 4
n = 444
Mean of all digits of the said number: 4
n = 1151
Mean of all digits of the said number: 2
```

Flowchart:

Live Demo:

See the Pen javascript-math-exercise-82 by w3resource (@w3resource) on CodePen.

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