# func01.py

def add(x,y):
    return x + y

def sub(x,y):
    return x - y

x = 1
y = 2
ans1 = add(x,y)
ans2 = sub(x,y)

print('{0} + {1} = {2}'.format(x,y,ans1))
print('{0} - {1} = {2}'.format(x,y,ans2))
