n1=int(input('enter first number:'))
n2=int(input('enter second number:'))
print('Before Swapping: n1=',n1,'n2=',n2)
n1=n1+n2
n2=n1-n2
n1=n1-n2
print('After Swapping: n1=',n1,'n2=',n2)

(OR)

# This will used for any datatype like strings also

n1=int(input('enter first number:'))
n2=int(input('enter second number:'))
print('Before Swapping: n1=',n1,'n2=',n2)
n1,n2=n2,n1
print('After Swapping: n1=',n1,'n2=',n2)