#define下定义
# def function_name():

# def func1():
#     print("hello function")
# func1()

# a=10
# b=10
# print(a+b)
#
# c=20
# d=20
# print(c+d)
#
# def sum(num1,num2):
#     print(num1+num2)
# sum(10,20)
# sum(1,2)
# sum(20,30)

# def fun2():
#     return "hello fun2"
# fun2()
# # print(fun2())
# a = fun2()
# print(a)

# def sum2(a,b):
#     return (a+b)
# b = sum2(1,2)
# print(b)

def minus(m1,m2):
    return m1-m2
print(minus(5,2))











