Python function to handle empty strings

Python None Data Type: Exercise-1 with Solution

Write a Python function that takes a string as input and returns "None" if the string is empty, otherwise it returns the given string.

Sample Solution:

Code:

def check_string(input_string):
    if not input_string:
        return "None"
    return input_string

def main():
    try:
        input_string = input("Input a string: ")
        result = check_string(input_string)
        print("Result:", result)
    except Exception as e:
        print("An error occurred:", e)

if __name__ == "__main__":
    main()

Output:

Input a string: 
Result: None

Input a string: python
Result: python

In the above exercise the program defines the "check_string()" function, which checks if the input string is empty. If it is, it returns the string "None", otherwise, it returns the original input string. The "main()" function takes user input, processes it using the "check_string()" function, and prints the result.

Flowchart:

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