Python program to swap two variables
In this tutorial, we will learn how to swap two variables in a Python program. Suppose we have two variables, P and Q; We have to write a Python program for swapping their values. We will also discuss the different methods in Python for doing this task.
Method 1: By using Naïve Approach
In this method, the naïve approach will store the value of the P variable in a temporary variable, and then it will assign the variable P with the value of the Q variable. Then, it will assign the value of the temporary variable to the Q variable, which will result in swapping the values of both the variable.
Example:
Output:
Please enter value for P: 13 Please enter value for Q: 43 The Value of P after swapping: 43 The Value of Q after swapping: 13
Method 2: By using comma operator
We can use the comma operator. We do not need to use a third variable for swapping the values of two variables for this method.
Example:
Output:
Please enter value for P: 12 Please enter value for Q: 43 The Value of P after swapping: 43 The Value of Q after swapping: 12
Method 3: By using XOR method
We can also use the bitwise XOR method for swapping two variables. The XOR of two variables, P and Q, will return the number which has all the bits as 1 whenever the bits of the P and Q variables differ.
Such as XOR of 4 (in binary 0100) and 6 (in binary 0110) is 1010.
XOR of 2 (in binary 0010) and 8 (in binary 1000) is 1010.
Example:
Output:
Please enter value for P: 12 Please enter value for Q: 10 The Value of P after swapping: 10 The Value of Q after swapping: 12
Method 4: By using arithmetic operators
In this method, we can swap values of both the variable in two ways:
- Using addition and Subtraction operator:
Example:
Output:
Please enter value for P: 15 Please enter value for Q: 43 The Value of P after swapping: 43 The Value of Q after swapping: 15
- Using multiplication and division operator
Example:
Output:
Please enter value for P: 23 Please enter value for Q: 14 The Value of P after swapping: 14.0 The Value of Q after swapping: 23.0
Conclusion
In this tutorial, we have discussed various methods to swap the value of two variables in the Python program.