Python: Get a new string from a given string where 'Is' has been added to the front. If the given string already begins with 'Is' then return the string unchanged

Last update on February 21 2025 07:48:07 (UTC/GMT +8 hours)

Prefix "Is" String Modifier

Write a Python program to get a newly-generated string from a given string where "Is" has been added to the front. Return the string unchanged if the given string already begins with "Is".

Pictorial Presentation:

Sample Solution:

Python Code:

# Define a function named "new_string" that takes a string parameter called "text"
def new_string(text):
    # Check if the length of the "text" is greater than or equal to 2 and if the first two characters of "text" are "Is"
    if len(text) >= 2 and text[:2] == "Is":
        # If the conditions are met, return the original "text" unchanged
        return text
    else:
        # If the conditions are not met, prepend "Is" to the "text" and return the modified string
        return "Is" + text

# Call the "new_string" function with the argument "Array" and print the result
print(new_string("Array"))

# Call the "new_string" function with the argument "IsEmpty" and print the result
print(new_string("IsEmpty"))

Sample Output:

IsArray                                                                                                       
IsEmpty

Explanation:

The said script defines a function "new_string(text)" takes a string as an argument, and checks whether the string's length is greater than or equal to 2 and the first two characters of the string are "Is". If both conditions are true, the function returns the original string. Otherwise, the function returns a new string "Is" concatenated with the original string.

The first print statement will display "IsArray" and the second will display "IsEmpty".

Flowchart:

For more Practice: Solve these Related Problems:

• Write a Python program that adds the prefix "Pre" to a given string if it does not already start with "Pre".
• Write a script that checks if a string starts with "Un" and, if not, appends "Un" to the beginning.
• Write a Python program that adds "Is" to a string but ensures it is case-insensitive (e.g., "is" and "IS" should be treated the same).
• Write a script that takes a list of words and adds "Is" only to words shorter than 5 characters.

Python Code Editor:

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