Q:

Calculate the sum and average of the digits present in a string using python programming

belongs to collection: Python String Exercises

YasminRadwan26
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2022-05-04
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Calculate the sum and average of the digits present in a string

Given a string s1, write a program to return the sum and average of the digits that appear in the string, ignoring all other characters.

Given:

str1 = "PYnative29@#8496"

Expected Outcome:

Sum is: 38 Average is  6.333333333333333
Python programming,
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YasminRadwan26
2022-05-04
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Hint:

Iterate each character from a string s1 and check if the current character is digit using the isdigit() function

Solution1:Use string functions

  • Iterate each character from a string s1 using a loop
  • In the body of a loop, check if the current character is digit using the isdigit() function
  • If it is a digit, then add it to the sum variable
  • In the end, calculate the average by dividing the total by the count of digits
input_str = "PYnative29@#8496"
total = 0
cnt = 0
for char in input_str:
    if char.isdigit():
        total += int(char)
        cnt += 1

# average = sum / count of digits
avg = total / cnt
print("Sum is:", total, "Average is ", avg)

Solution2:Use regular expression

import re

input_str = "PYnative29@#8496"
digit_list = [int(num) for num in re.findall(r'\d', input_str)]
print('Digits:', digit_list)

# use the built-in function sum
total = sum(digit_list)

# average = sum / count of digits
avg = total / len(digit_list)
print("Sum is:", total, "Average is ", avg)

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