def a(x,y): # this is function a print(x,y) #@1.5 x =1 y=2 x1=x # define x with value 1 y1=y # define y with value 2 return x1+y1 print(a(1,2)+a(3,4)) # print(3+a(3,4)) print (3+7) print(10) print(a) https://www.youtube.com/watch?v=pM9IO3FCULQ