Keywords in Python
Keywords in Python are reserved words that have special meanings and are an integral part of the Python programming language. These keywords are predefined and serve specific purposes within the language’s syntax and structure. As a result, you cannot use these keywords as identifiers for variables, function names, or other user-defined entities in your Python code.
Python’s keywords are used to define control structures, declare functions and classes, handle exceptions, specify Boolean values, and more. They play a crucial role in shaping the structure and behavior of Python programs.
In the below PDF we discuss about Keywords in detail in simple language, Hope this will help in better understanding.
Here's a list of some of the common keywords in Python:
- if: Used to define conditional statements.
- elif: Short for “else if,” used in conditional statements for additional conditions.
- else: Used in conditional statements to specify the block of code to execute when the condition is not met.
- for: Used to create loop constructs for iterating over sequences like lists, strings, or dictionaries.
- while: Used for creating loops that repeatedly execute a block of code as long as a specified condition is true.
- def: Used to define functions in Python.
- return: Used inside functions to specify the value that the function should send back to the caller.
- class: Used to define classes, which are blueprints for creating objects in object-oriented programming.
- import: Used to include external modules or libraries in your Python code.
- try: Begins a block of code for exception handling.
- except: Specifies how to handle exceptions raised within a try block.
- finally: Defines a block of code that will be executed whether an exception is raised or not.
- True: Represents the Boolean value “true.”
- False: Represents the Boolean value “false.”
- None: Represents a special null-like value often used to indicate the absence of a value.
- and, or, not: Logical operators for combining or negating Boolean expressions.
- in: Used to check if a value exists in a sequence.
- lambda: Used to create anonymous functions (lambda functions) for simple operations.
Related Question
Keywords in Python are reserved words that have special meanings and cannot be used as variable names or identifiers.
Keywords are important because they define the syntax and structure of the Python language. They are used to create conditions, loops, functions, and classes, among other fundamental constructs.
No, you cannot create custom keywords in Python. Keywords are predefined and reserved for specific purposes within the language.
Keywords are reserved words with predefined meanings in Python, while identifiers are user-defined names for variables, functions, classes, etc. Identifiers cannot have the same name as keywords.
No, Python keywords are not case-sensitive. This means that you can use them in lowercase or uppercase, and they will have the same meaning. For example, if, IF, and If all represent the same keyword.
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In one of the questions provided, i feel the answer is incorrect.
Python keywords are Case-sensitive, but you mentioned it is not. Python treats uppercase and lowercase letters differently. if, IF and If are all three different variables where only “if” is a keyword and others are just mere variables.