15/10/2025 function 

def a(x,y): # @1.5 x=1 y=2
    print(x+y)
a(1,2)
a(2,3) # @1.5 x=2 y=3
def b(x,y=1): # @5 x=? , y=1
    print(x+y)
b(1) # @5.5 x=1
b(2,3) # @5.5 x=2 y=3