How can you convert a string to an integer in Python?

• A. Using the float() function
• B. Using the str() function
• C. Using the convert() function
• D. Using the int() function

Answer: (D)

To convert a string to an integer in Python, the int() function is used. This built-in function takes a string as input and outputs its integer representation. For example, if you have a string value of "42", calling int("42") will provide the integer value 42.

The int() function is versatile and can handle various string formats, provided they are properly formatted as integer representations. If the string cannot be converted to an integer (like "hello" or "3.14"), the function will raise a ValueError, indicating that the conversion isn't applicable in those cases.

Using the other options does not achieve the intended conversion from string to integer. The float() function, for instance, converts a string to a floating-point number rather than an integer. The str() function reverses the process by converting other data types to a string. Meanwhile, the convert() function is not a standard function in Python for type conversion, which makes it unsuitable for this task.