1、打开JUPYTER NOTEBOOK，新建一个PYTHON文档。
2、number_1 = input("Please input the first number: ")
number_2 = input("Please input the second number: ")
首先要定义两个变量，用INPUT提示用户输入。
3、number_1 = input("Please input the first number: ")
number_2 = input("Please input the second number: ")
caculation = input("Please enter operator: ")
算法我们也要提示用户输入。
4、number_1 = float(input("Please input the first number: "))
number_2 = float(input("Please input the second number: "))
caculation = input("Please enter operator: ")
为了不影响输入，加上FLOAT，这样输入浮点型也可以显示。
5、number_1 = float(input("Please input the first number: "))
number_2 = float(input("Please input the second number: "))
caculation = input("Please enter operator: ")
if caculation == "+":
print(number_1 + number_2)
elif caculation == "-":
print(number_1 - number_2)
elif caculation == "*":
print(number_1 * number_2)
elif caculation == "/":
print(number_1 / number_2)
用IF和ELIF来排除条件。
6、number_1 = float(input("Please input the first number: "))
number_2 = float(input("Please input the second number: "))
caculation = input("Please enter operator: ")
if caculation == "+":
print(number_1 + number_2)
elif caculation == "-":
print(number_1 - number_2)
elif caculation == "*":
print(number_1 * number_2)
elif caculation == "/":
print(number_1 / number_2)
else:
print("wrong type")
最后要加上ELSE，因为怕用户输入了不知名的算法。并且做出提示。
7、number_1 = float(input("Please input the first number: "))
number_2 = float(input("Please input the second number: "))
caculation = input("Please enter operator: ")
if caculation == "+":
print(number_1 + number_2)
elif caculation == "-":
print(number_1 - number_2)
elif caculation == "*":
print(number_1 * number_2)
elif caculation == "/":
print(number_1 / number_2)
else:
print("wrong type")
尝试一下一些复杂的数值来测试是否制作完成。
