Web Reference: Oct 13, 2025 · Strings are immutable by design to keep them safe, consistent, and efficient. Immutability makes strings hashable (usable as dictionary keys), memory-efficient, and thread-safe, ensuring they can be reused without unexpected changes. Mar 1, 2015 · I am talking about Python, but to contrast mutable with immutable strings (part of the question and all answers, mind you), I provided an example. This example couldn't have been in Python as it has immutable strings only. Write a program to create a new string made of an input string’s first, middle, and last character. Given: Expected Output:
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