Q.Which of the following are keywords in Python?

The key idea here is understanding Python Keywords. Keywords are reserved words in Python that have special meanings and cannot be used as identifiers (like variable names, function names, etc.).

1. Python has a predefined set of keywords that are part of its syntax.
2. break is a keyword used to terminate the current loop prematurely. …

Understanding Keywords in Python

In any programming language, certain words are reserved for special purposes. These are called keywords. Think of them as the fundamental building blocks or commands that the language itself understands directly. They have predefined meanings and functionalities, and you cannot use them for anything else, such as naming your variables, functions, or classes.

The reason for this reservation is to maintain clarity and avoid ambiguity. If you could name a variable while, for instance, the Python interpreter wouldn't know if you meant to start a loop or refer to your variable. By reserving while for loops, the language remains consistent and predictable.

Python's set of keywords is relatively small and stable, making it easier to learn. Knowing which words are keywords is crucial because attempting to use a keyword as an identifier will result in a SyntaxError.

Identifying the Keywords

Let's examine each option to determine if it is a keyword in Python. A simple way to verify this in a Python environment is to use the keyword module, specifically keyword.iskeyword(), or to print the list of all keywords using keyword.kwlist.

1. (i) break

   • break is a keyword in Python.
   • It is used to terminate the current loop (either for or while) prematurely. When break is encountered, the loop is immediately exited, and execution continues with the statement following the loop.

   # Example usage of 'break'
   for i in range(5):
       if i == 3:
           break
       print(i)
   # Output:
   # 0
   # 1
   # 2
   

2. (ii) check

   • check is not a keyword in Python.
   • It is a regular identifier that you can use to name variables, functions, or anything else you define. For example, you could have a variable named check = True or a function def check_status():.

3. (iii) range

   • range is not a keyword in Python.
   • It is a built-in function that generates an immutable sequence of numbers. While range() is fundamental and frequently used, it is a function that you call, not a reserved word with special syntax.