Python code to swap 2 number with or without third variable.

 Swapping two numbers in Python can be done in a variety of ways. Here are a few methods to swap two numbers, along with explanations:

1. Using a Temporary Variable

This is the traditional method of swapping two numbers using a temporary variable.

python

# Method 1: Using a temporary variable

# Initial values
a = 5
b = 10

# Print original values
print("Before swapping:")
print("a =", a)
print("b =", b)

# Swap using a temporary variable
temp = a
a = b
b = temp

# Print swapped values
print("After swapping:")
print("a =", a)
print("b =", b)

2. method

Python allows for a more concise and elegant way to swap values using tuple unpacking.

python
# Method 2: Using tuple unpacking

# Initial values
a = 5
b = 10

# Print original values
print("Before swapping:")
print("a =", a)
print("b =", b)

# Swap using tuple unpacking
a, b = b, a

# Print swapped values
print("After swapping:")
print("a =", a)
print("b =", b)

3. Using Arithmetic Operations

You can also swap two numbers using arithmetic operations. This method doesn’t require a temporary variable but involves some arithmetic.

python

# Method 3: Using arithmetic operations

# Initial values
a = 5
b = 10

# Print original values
print("Before swapping:")
print("a =", a)
print("b =", b)

# Swap using arithmetic operations
a = a + b
b = a - b
a = a - b

# Print swapped values
print("After swapping:")
print("a =", a)
print("b =", b)

Explanation of Each Method

• Temporary Variable: Simple and easy to understand; involves using an extra variable.
• 2 method: Python-specific, concise, and elegant; no extra variable needed.
• Arithmetic Operations: Uses basic arithmetic to swap values; be cautious with large numbers to avoid overflow..

Choose the method that best fits your needs and coding style.