Python Program to Swap Two Numbers

Write a Python program to Swap Two Numbers using the Temp variable, Bitwise Operators, and Arithmetic Operators.

Python Program to Swap Two Numbers

This python program to swap two numbers helps the user to enter two numeric values. Next, Python swap those two values using temp variables.

a = float(input(" Please Enter the First Value a: "))
b = float(input(" Please Enter the Second Value b: "))

print("Before Swapping two Number: a = {0} and b = {1}".format(a, b))

temp = a
a = b
b = temp

print("After Swapping two Number: a = {0} and b = {1}".format(a, b))

Python Swap Two Numbers output

 Please Enter the First Value a: 10
 Please Enter the Second Value b: 20
Before Swapping two Number: a = 10.0 and b = 20.0
After Swapping two Number: a = 20.0 and b = 10.0

In the above python program example, we assigned a = 10 and b = 20

Temp = a – assigning a value to Temp variable
Temp = 10

a = b – assign b value to variable a
a = 20

b = Temp – Temp value to variable b
b = 10

Python Program to Swap Two Numbers using Functions

This program for swap numbers is the same as above, but this time, we separated the logic using Functions.

def swap_numbers(a, b):
    temp = a
    a = b
    b = temp
    
    print("After: num1 = {0} and num2 = {1}".format(a, b))
 
num1 = float(input(" Please Enter the First Value : "))
num2 = float(input(" Please Enter the Second Value : "))

print("Before: num1 = {0} and num2 = {1}".format(num1, num2))
swap_numbers(num1, num2)
 Please Enter the First Value : 15
 Please Enter the Second Value : 25
Before: num1 = 15.0 and num2 = 25.0
After: num1 = 25.0 and num2 = 15.0

Python Swap Two Numbers using Arithmetic Operators

In this Python example, instead of using the temp or third variable to swap two numbers, we are going to use Arithmetic Operators

a = float(input(" Please Enter the First Value a: "))
b = float(input(" Please Enter the Second Value b: "))

print("Before Swapping two Number: a = {0} and b = {1}".format(a, b))

a = a + b
b = a - b
a = a - b

print("After Swapping two Number: a = {0} and b = {1}".format(a, b))
Python Program to Swap Two Numbers 3

User Entered Values are a = 25 and b = 45

a = a+b = 25 + 45 = 70

b = a-b = 70 -45 = 25

a = a-b = 70 – 25 = 45

Python Swap Two Numbers using Bitwise Operator

Here, we are using Bitwise operators to swap two numbers.

a = int(input(" Please Enter the First Value : "))
b = int(input(" Please Enter the Second Value : "))

print("Before: a = {0} and b = {1}".format(a, b))

a = a^b
b = a^b
a = a^b

print("After: a = {0} and b = {1}".format(a, b))

using Bitwise Operators output

 Please Enter the First Value : 111
 Please Enter the Second Value : 222
Before: a = 111 and b = 222
After: a = 222 and b = 111