Keywords and Identifiers in Python
Keywords and Identifiers in Python:
Keyword is a reserved word in Python that has special meaning and can not be used as an identifier.These unique words are used to define the syntax and the structure of the Python language. Whereas, the names given to variables, functions, classes, etc., are identifiers.
Keywords and Identifiers in Python
Keywords and Identifies are two fundamental aspects of python programming language that make it incredibly coder friendly, which will help you understand why you should learn it.
Keywords in Python :
A Python keyword is a special reserved word that has specific meaning and purpose, and can only be used in the context of its specific meaning and purpose.
All Keywords in Python are in lower case but some keywords like True, False etc are in uppercase. So, We can say that Python can have keywords as lowercase, uppercase as well as Capitalized.
Common Keywords used in Python:
- if
- else
- for
- True
- False
- break
- pass
- continue
Example of Keywords:
me='Xyz'
if(me=='Prepster'):
print('Welcome to PrepInsta')
else :
print('You are welcome to become a Prepster.')
Output :
You are welcome to become a Prepster.
Identifiers in Python:
An identifier is a name assigned to an entity, such as a variable, class, function, etc. By identifying entities in code, it is easier to understand their flow and differentiate them from each other.
There are some rules for identifiers in python:
- All identifiers must begin with a letter (a-z, A-Z) or an underscore (_).
- The rest of the identifier can contain letters, digits (0-9), and underscores.
- Identifiers are case-sensitive, meaning myVar and myvar are treated as different identifiers.
- In order to make your code more readable, you should name your identifiers descriptively and meaningfully.
- In Python, An Identifier can have a maximum length of 79 characters.
Valid identifier: abc123
Invalid identifier: 123abc
Example of Identifiers:
my1 = "Prepinsta" print(my1)
Output: Prepinsta
1my = "Prepinsta" print(1my)
Output: File "/home/main.py", line 3 1my = "prep" ^ SyntaxError: invalid decimal literal
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