'''import demo
#demo.main()
print("Its time to Calculate")
print("Hello ",__name__)
def add(a,b):
    return a+b
def sub(a,b):
    return a-b'''

def sum():
    print("result 1 is ",__name__)

def sub():
    print("result 2 is ")

def main():
    sum()
    sub()

if __name__ == '__main__':
    main()