Exchange the value of the two variable which is already exist is called swapping.
Example -
Before swapping
a=10
b=20
After swapping
a=20
b=10
program-
print("Enter first value")
a=input()
print("Enter second value")
b=input()
print("Before swapping -")
print(a,b)
t=a
a=b
b=t
print("After swapping -")
print(a,b)
Enter first value
3
Enter second value
4
Before swapping -
3 4
After swapping -
4 3
Enter first value
#
Enter second value
@
Before swapping -
# @
After swapping -
@ #