Python Revision Notes

 

1. Basics of Python

  • High-level, interpreted, object-oriented, general-purpose language.

  • Easy syntax, dynamically typed (no need to declare variable type).

  • Uses indentation instead of braces {}.

2. Lexical Units

  • Keywords: Reserved words (e.g., if, while, class, True, False).

  • Identifiers: Names given to variables, functions, etc.

  • Literals: Constant values (e.g., 10, 3.14, "hello", True).

  • Operators: Symbols for operations (+, -, *, /, %, ==, and, or).

  • Delimiters: Brackets, colon, comma, etc.

Comments

Post a Comment

Popular posts from this blog

Python Revision Notes

11. String Operations s = "Python" print (s.upper()) # PYTHON print (s[ 0 : 3 ]) # Pyt print ( "th" in s) # True 12. File Handling f = open ( "data.txt" , "w" ) f.write( "Hello File" ) f.close() f = open ( "data.txt" , "r" ) print (f.read()) f.close() 13. Exception Handling try : a = int ( input ( "Enter number: " )) print ( 10 /a) except ZeroDivisionError: print ( "Division by zero not allowed" ) except ValueError:  print ( "Invalid input" ) 
Read more

Python Revision Notes

  7. Loops for i in range ( 5 ): print (i) while x > 0 : print (x) x -= 1 Break : Exit loop. Continue : Skip iteration. 8. Functions def greet ( name ): return "Hello " + name print (greet( "Ajm" )) Built-in functions: len() , type() , id() , sum() , max() , min() etc.
Read more