Swap between 2 number without the help of third variable in Python

n1=8
n2=9
print(“Before swap”)
print(“n1=”,n1)
print(“n2=”,n2)
n1=n1+n2
n2=n1-n2
n1=n1-n2
print(“After swap”)
print(“n1=”,n1)

print(“n2=”,n2)

Before swap
n1= 8
n2= 9
After swap
n1= 9

n2= 8