Find Average of a Number Digits in Python

Last Updated : 07 Feb, 2023

AIn this article, we will see how to find the average of the digits of a number in Python.

Examples:

Input: N = 642
Output: 4.0
Explanation: (6+4+2)/3 = 12/3 = 4.0

Input: N = 3504
Output: 3.0
Explanation: (3+5+0+4)/4 = 12/4 = 3.0

Calculate the average of a number of digits in python if the number is an integer:

Follow the below steps to solve the problem:

Loop over the digits of the number.
Count the total number of digits of the number
Calculate the sum of all the digits of the number
Calculate and return the number digit average

Following is an implementation of the above approach:

Python3

# Python function to find the
# average of all the digits of a number
 
 
def digitAverage(n):
    digiSum, digiLen = 0, 0
 
    # loop over the digits of the number
    while n:
        # calculating the number of all the digits
        digiLen += 1
        # calculating the sum of all the digits
        digiSum += n % 10
        # remove the last digit from the original number
        # to continue to loop over the digits
        n = n//10
 
    # calculate and return the average
    return (digiSum/digiLen)
 
 
print(digitAverage(642))
print(digitAverage(3504))

Output

4.0
3.0

Time complexity: O(n)
Auxiliary Space: O(1)

Calculate the average of a number of digits in python if the number is a floating-point number:

In case the input number is a floating point number, we will first convert it into an integer by shifting all the decimal digits by repeatedly multiplying it by 10.

To check if a float is equivalent to an integer we can use the is_integer() method of the float class.

Follow the below steps to solve the problem:

First, we will repeatedly multiply the decimal number by 10 until it becomes an integer
Then we can simply follow our previous approach
Loop over the digits of the number.
Count the total number of digits of the number
Calculate the sum of all the digits of the number
Calculate and return the number digit average

Following is an implementation of the above approach:

Python3

# Python function to find the average
# of all the digits of a number
 
 
def digitAverage(n):
 
    # changing the float into an integer
    # by repeatedly multiplying the number by 10
    n = float(n)
    while not n.is_integer():
        n *= 10
 
    digiSum, digiLen = 0, 0
 
    # loop over the digits of the number
    while n:
        # calculating the number of all the digits
        digiLen += 1
        # calculating the sum of all the digits
        digiSum += n % 10
        # remove the last digit from the original number
        # to continue to loop over the digits
        n = n//10
 
    # calculate and return the average
    return (digiSum/digiLen)
 
 
print(digitAverage(642.0))
print(digitAverage(350.4))

Output

4.0
3.0

Time complexity: O(d), d is the number of digits in the given number n.
Auxiliary space: O(1).

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Find Average of a Number Digits in Python

Calculate the average of a number of digits in python if the number is an integer:

Python3

Calculate the average of a number of digits in python if the number is a floating-point number:

Python3

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