swapping of two numbers in python

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There are multiple ways to swap the values of two variables in Python. Here are a few common methods:-
1. using temporary or third variable
2. without using a temporary
3. using tuple packing and unpacking
4. Using the xor operator

How can we swap two numbers in python using third variable?

Here’s an example of how to swap the values of two variables in Python using a temporary or third variable:

def swap(x, y):
    temp = x
    x = y
    y = temp

a = 10
b = 20
swap(a, b)
print(a)  # Output: 20
print(b)  # Output: 10

How do you swap two numbers without using a temporary variable in python?

Here’s an example of how to swap the values of two variables in Python without using a temporary variable:

def swap(x, y):
    x = x + y
    y = x - y
    x = x - y

a = 10
b = 20
swap(a, b)
print(a)  # Output: 20
print(b)  # Output: 10

Using tuple packing and unpacking:

Using tuple packing and unpacking is a simple and efficient way to swap the values of two variables in Python. Here’s an example of how to do this:

def swap(x, y):
    x, y = y, x

a = 10
b = 20
swap(a, b)
print(a)  # Output: 20
print(b)  # Output: 10

In this example, the swap() function takes two variables x and y as arguments and swaps their values using tuple packing and unpacking. It packs the values of x and y into a tuple, and then unpacks the tuple into the variables x and y. This effectively swaps the values of x and y.

Tuple packing and unpacking is a convenient and concise way to swap the values of two variables, and it is often used in Python for this purpose. It is also useful for swapping the values of multiple variables at once.

For example, to swap the values of three variables x, y, and z, you can use tuple packing and unpacking as follows:

def swap(x, y, z):
    x, y, z = z, x, y

a = 10
b = 20
c = 30
swap(a, b, c)
print(a)  # Output: 30
print(b)  # Output: 10
print(c)  # Output: 20

Using the xor operator

Using the xor operator is another way to swap the values of two variables in Python without using a temporary variable. Here’s an example of how to do this:

def swap(x, y):
    x = x ^ y
    y = x ^ y
    x = x ^ y

a = 10
b = 20
swap(a, b)
print(a)  # Output: 20
print(b)  # Output: 10

In this example, the swap() function takes two variables x and y as arguments and swaps their values using the xor operator.

The xor operator (^) performs a bitwise exclusive OR operation on two operands. It returns 1 if either of the operands is 1, but not both, and returns 0 if both operands are 0 or both operands are 1.

In the swap() function, the first line performs a bitwise exclusive OR operation on x and y and stores the result in x. The second line performs a bitwise exclusive OR operation on x and y again, but this time it stores the result in y. Finally, the third line performs a bitwise exclusive OR operation on x and y again and stores the result in x. This effectively swaps the values of x and y.

The xor operator is a fast and efficient way to swap the values of two variables, and it is often used for this purpose in Python. However, it is important to note that it only works for integers and not for floating-point numbers or other data types.

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