Python: Sum of all numerical values embedded in a sentence
Python Basic - 1: Exercise-56 with Solution
Write a Python program to sum all numerical values (positive integers) embedded in a sentence.
Input:
Sentences with positive integers are given over multiple lines. Each line is a character string containing one-byte alphanumeric characters, symbols, spaces, or an empty line. However the input is 80 characters or less per line and the sum is 10,000 or less.
Sample Solution:
Python Code:
# Import sys and re modules
import sys
import re
# Define a function named 'test' that takes a string 'stri' as a parameter
def test(stri):
# Print statement to instruct the user to input text and numeric values (terminate with )
print("Input some text and numeric values ( to exit):")
# Use regex to find all numeric values in the input string and sum them
numeric_sum = sum(map(int, re.findall(r"[0-9]{1,5}", stri)))
# Print the sum of the numeric values
print("Sum of the numeric values: ", numeric_sum)
# Test the 'test' function with different input strings
print(test("sd1fdsfs23 dssd56"))
print(test("15apple2banana"))
print(test("flowers5fruit5"))
Sample Output:
Input some text and numeric values (to exit): Sum of the numeric values: 80 None Input some text and numeric values ( to exit): Sum of the numeric values: 17 None Input some text and numeric values ( to exit): Sum of the numeric values: 10 None
Explanation:
Here is a breakdown of the above Python code:
- Import the "sys" and "re" modules.
- Define a function named "test()" that takes a string parameter 'stri'.
- Print a statement instructing the user to input text and numeric values, indicating termination with <ctrl-d>.
- Use the re.findall function with a regex pattern to find all numeric values (1 to 5 digits) in the input string.
- Map the found numeric values to integers and calculate their sum using "sum()".
- Print the sum of the numeric values.
- Test the "test()" function with three different input strings. Note: The function should not return anything (hence, print(test(...)) may print None).
Visual Presentation:
Flowchart:
![Flowchart: Python - Sum of all numerical values embedded in a sentence](https://www.w3resource.com/w3r_images/python-basic-1-exercise-flowchart-56.png)
Python Code Editor:
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