Issue for var

Question

Var a=10;
Var b=20;
Print a value 20
And second print b value 10
Not use thard var

Answer 1

previous one will work in python.
u can try following logic:

a=a+b
b=a-b
a=a-b

this will work in all languages.

Answer 2

for swapping values without using any extra variables:
a=10
b=20
a,b = b,a
print(a,b)

output:
20 10