What type of value is returned by the expression "hello" + "world" in Python?

The expression "hello" + "world" in Python utilizes the concatenation operator (+) to combine two strings. In Python, when you add two strings together, the result is a new string that contains the characters of both strings placed right next to each other. Therefore, the result of the expression "hello" + "world" will be "helloworld". Since the outcome is a combination of text characters, it is classified as a string data type.

Concatenation is a fundamental feature of string manipulation in Python, allowing for flexible and dynamic construction of text output. The string data type is specifically designed to represent sequences of characters, making string concatenation a common and useful operation in programming.