Variables in Python

Python variables are like containers that store values in a program. When you create a variable, Python sets aside space in memory to hold the value. The type of value you store decides how much space is needed.

Example 1: Basic Variable Assignment

x = 5
y = 'Hello'
print(x)
print(y)

Output:

5
Hello

Assigns integer and string values to variables and prints them.

Example 2: Multiple Assignment

a, b, c = 1, 2, 3
print(a, b, c)

Output:

1 2 3

Assigns multiple variables in one line.

Example 3: Type Casting

x = int(2.5)
y = float(5)
z = str(10)
print(x, y, z)

Output:

2 5.0 10

Casts values into integer, float, and string types.

Example 4: Case Sensitivity

a = 10
A = 20
print(a)
print(A)

Output:

10
20

Shows that Python variable names are case-sensitive.

Example 5: Variable Naming Rules

my_var = 5
_var2 = 10
print(my_var + _var2)

Output:

Demonstrates valid variable naming rules.

Example 6: Swapping Variables

x, y = 5, 10
x, y = y, x
print(x, y)

Output:

10 5

Swaps values of two variables in one line.

Example 7: Global and Local Variables

x = 'global'

def test():
    x = 'local'
    print(x)

test()
print(x)

Output:

local
global

Shows difference between local and global variables.

Example 8: Constants Convention

PI = 3.1416
print(PI)

Output:

3.1416

Shows how constants are usually named in uppercase.

Example 9: Assigning Same Value to Multiple Variables

a = b = c = 100
print(a, b, c)

Output:

100 100 100

Assigns the same value to multiple variables.

Example 10: Unpacking a List

fruits = ['apple', 'banana', 'cherry']
x, y, z = fruits
print(x, y, z)

Output:

apple banana cherry

Unpacks list elements into separate variables.

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