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What is the difference between a keyword and an identifier in Python? Give an example of each.
Answer:
Answer by student
The difference between a keyword and an identifier in Python is that a keyword is a reserved word that has a special meaning and purpose in the language , while an identifier is a user-defined name that is used to identify a variable, function, class, module, or other object . An example of a keyword is def , which is used to define a function. An example of an identifier is x , which can be used to store a value.
Detailed answer by teachoo
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The difference between a keyword and an identifier in Python is that a keyword is a reserved word that has a special meaning and purpose in the language , while an identifier is a user-defined name that is used to identify a variable, function, class, module, or other object.
- A keyword is one of the predefined words in Python that cannot be used as an identifier. There are 35 keywords in Python 3.9, such as def, if, for, while, class, import, etc. They are used to define the structure and syntax of the language and perform various operations.
- An identifier is any name that follows certain rules and conventions. It can start with an uppercase or lowercase letter or an underscore (_), but not with a digit. It can contain letters, digits, or underscores, but not any other symbols or spaces. It cannot be one of the keywords or built-in names in Python. It is case-sensitive, which means that x and X are different identifiers.
- An example of a keyword is def, which is used to define a function. For example:
def greet(name):
print("Hello", name)
- In this example, def is a keyword that tells Python that we are creating a function named greet that takes one parameter named name.
- An example of an identifier is x, which can be used to store a value. For example:
x = 10
print(x)
- In this example, x is an identifier that we have chosen to name our variable that holds the value 10. We can use x to access or modify the value later.
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