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"Python is a high-level programming language. It is also known as an interpreted language because it executes code line by line, rather than compiling the entire program at once."

The Variables are used to hold the values of different data types in Python. There are primarily two types of variables in most programming languages. The local variable and the Global variable.

Variable
Local Variable
Global Variable
Image

Local variable

The local varible is only defined with in the the specific functions. The local variable in a program doesn't hold any value outside the function in a program.

x=10
y=20
def add(a,b):
c=a+b
return c
sum=add(x,y)
print(sum)
// here the variables a,b are local variables

Global Variable

The Global Variable is the variable which is defined for the whole program it will work in every function.

x=10
y=20
def add(a,b):
c=a+b
return c
sum=add(x,y)
print(sum)
// Here the variables x and y are global variables

Data Types

"Data types define the kind of value a variable can hold. They determine the operations that can be performed on the variable.A variable can be of numeric data type(int,float,complex),String Data type etc.

"In Python, you don't need to explicitly declare the data type of a variable, unlike in languages like C and C++."

There are mainly 6 Types of Data type:

Data Types

Numeric

String

List

Boolean

Tuple

Dictionary

Numeric Data Type

Numeric data types represent numbers. They are further classified into two categories:

  • Integer: Whole numbers (e.g., 10, -5, 0)
  • Float: Decimal numbers (e.g., 3.14, -2.5)

String Data Type

A sequence of characters enclosed in single or double quotes.

Example: "Hello, World!"

Boolean Data Type

Represents either True or False.

Example: True, False

List Data Type

An ordered collection of items, enclosed in square brackets.

Example: [1, 2, 3, "apple", "banana"]

Dictionary Data Type

An unordered collection of key-value pairs, enclosed in curly braces.

Example: {"name": "Alice", "age": 30, "city": "New York"}

Tuple Data Type

An ordered, immutable collection of items, enclosed in parentheses.

Example: (10, 20, 30, "Python")

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