简单用户输入

Posted 2020-11-24 python-beginner

death_age = 80

name = input(“your name:”)

age = input("your age:")

#print(name,age)

print("your name:",name)

print("you can still live for ",（death_age - age）)

或者print("you can still live for "+（death_age - age）)

直接运行报错

syntax error :unsupported operand type

语法错误：不支持的操作运算类型

原因分析：input默认接收数据类型为str（string），str跟int类型不能进行数学运算，需进行强制数据类型转换

猜年龄游戏

age_of_ principal = 56

guess_age = int (input(">>:"))

if guess_age == age_of_principal:

　　print("yes,you got it")

else;

　　print("no,you are wrong")

缩进介绍

为什么要有缩进？程序需要知道代码什么时候开始、什么时候结束。python通过统一的缩进规范同级代码。

age_of_ principal = 56

guess_age = int (input(">>:"))

if guess_age == age_of_principal:

print("yes,you got it")

else;

print("no,you are wrong")

IndentationError:expected an indented block

猜年龄增加大小判断

age_of_principal = 56
guess_age = int(input(">>:"))
if guess_age == age_of_principal:
　　print("yes,you got it")
elif guess_age > age_of_principal:
　　print("should try smaller...")
else:
　　print("should try bigger...")

score = int(input("scores:"))
if score > 90:
　　print("A")
elif score > 80:
　　print("B")
elif score > 70:
　　print("C")
else:
　　print("D")