Python Fundamentals Class 11
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The document provides an overview of Python fundamentals for a class at GVK Chinmaya Vidyalaya, covering various types of operators, expressions, statements, functions, and the structure of Python programs. It explains arithmetic, assignment, comparison, logical, identity, membership, and bitwise operators along with concepts like variables, comments, and dynamic typing. Additionally, the document discusses input/output operations and how to use the print function effectively.
Python Fundamentals Class 11
- 1. GVK CHINMAYA VIDYALAYA SENIOR SECONDARY SCHOOL Kothuru, Indukurupet, SPS Nellore Python Fundamentals Class: 11 Subject: Python Teacher: C Vijaya
- 2. Python Operators Operators are used to perform operations on variables and values. Python divides the operators in the following groups: ● Arithmetic operators ● Assignment operators ● Comparison operators ● Logical operators ● Identity operators ● Membership operators ● Bitwise operators
- 3. Python Arithmetic Operators Arithmetic operators are used with numeric values to perform common mathematical operations:
- 4. Python Assignment Operators Assignment operators are used to assign values to variables:
- 5. Python Comparison Operators Comparison operators are used to compare two values:
- 6. Python Logical Operators Logical operators are used to combine conditional statements:
- 7. Python Identity Operators Identity operators are used to compare the objects, not if they are equal, but if they are actually the same object, with the same memory location:
- 8. Python Membership Operators Membership operators are used to test if a sequence is presented in an object:
- 9. Python Bitwise Operators Bitwise operators are used to compare (binary) numbers:
- 10. Punctuators
- 11. Various Components of Program structure: 1. Expressions 2. Comments 3. Statements 4. Function 5. Blocks and Indentation Basic Structure of Python program
- 12. Expressions is any legal combination of symbols that represents a value. a=15 b=2.9 a=b+3 a>7 Expressions that are values only Complex expressions that produce a value when evaluated
- 13. Statements: A statement is a programming instruction that does something. Print(“Hello GVKCV”) this statement calls print function
- 14. Comments: Comments are the addtional readable information to clarify the source code # First comment # Second comment Multi-line Comment: Comments enclosed in triple quotes. “”” Welcome to Python Class”””
- 15. Functions:. A function is a code that has a name and it can be reused by specifying its name in the program.
- 16. Blocks and Indentation: A group of statements which are part of another statement or a function are called block. Statements at same indentation level are part of same block.
- 17. Varibales: Named labels,whose values can be used and processed during program run. a=87 name=”GVKCV” Variables and assignments
- 18. In python , assigning a value to a variable means,variables label is referring to that value. a=b=c=10 x,y,z=1,2,3 Ex: a,b,c=10,20,30 b,c,a=a+1,b+2,c+3 print(a,b,c) O/P: 31,11,22 Multiple Assignments Ex: p,q=3,5 q,r=p-2.p+2 print(p,q,r) 3,1,5
- 19. A variable is defined only when you assign some value to it. Using an undefined variable in an expression/statement causes an error called name error. Eg: x=10 print(x) Variable Definition Eg: print(x) x=10 This throws error
- 20. A variable pointing to a value of a certain type, can be made to point to a value/object of different type. This is called Dynamic typing Eg: >>x=10 >>print(x) >>10 >>x=”GVKCV” >>print(x) >>GVKCV Dynamic Typing Eg: >>a=10 >>type(a) <class’int’> >>a=10.9 >>type(a) <class’float’> >>a=”gvkcv” >>type(a) <class’str’>
- 21. Simple input and output Eg: >>name=input(“Enter your name”) Enter your name GVKCV >>age=input(“Enter your age”) Enter your age 22 >> name GVKCV >>type(name) <class’str’> >>age 22 >>type(age) <class ‘str’) >>age+1 Type Error Note: The Input() function always returns a value of string type.
- 22. Reading Numbers >> age=input(“Enter your age”) Enter your age 22 >>age=int(age) >>age+1 23 >>age=int(input(“Enter your age”) Enter your age 16 >>type(age) <class’int’> >> age=input(“Enter your age”) Enter your age 22 >>age=float(age) >>age+1 23.0 >>age=float(input(“Enter your age”) Enter your age 16 >>type(age) <class’float>
- 23. Output Through print statement Eg: >>print(“Welcome to python class”) Welcome to python class >>a=10 >>print(“The value stored in varible a is”,a) The value stored in variable a is 10 >>print(“My”,”Name”,”is”,”GVKCV”,sep=”....”) My….Name….is….GVKCV