Swapping numbers
Swapping numbers means exchanging the values between two or more variables. In this program, we are going to swap two numbers without using any temporary variable.
Logic
- Store addition of variable a and b (a+b) to variable a.
- Now extract b from a and store it to b.
- Extract b from a and store it to a.
Now b is holding a’s original value and similarly, a is holding b’s original value.
Program
# Take input from user a = int(input("Enter number a : ")) b = int(input("\nEnter number b : ")) print("\nBefore swapping a = " + str(a) + " b = " + str(b)) # Swapping number a = a + b b = a - b a = a - b print("After swapping a = " + str(a) + " b = " + str(b))
Output
Enter number a : 10
Enter number b : 200
Before swapping a = 10 b = 200
After swapping a = 200 b = 10