python 输入输出 条件判断 循环

1、条件判断

score = int(input("请输入学生成绩："))if score>100 and score <0:    print("请输入正确的成绩")elif score<=100 and score >=90:    print("优秀")elif score < 90 and score >= 80:    print("良好")elif score <80 and score >= 60:    print("及格")else:    print("不及格")

2、while循环

count =0

while count<4:    print(count)    count = count+1

# break 循环中遇到break立即结束# continue 循环里遇到continue就结束本次循环print(‘----------------------------‘)

import randomnumber = random.randint(1,100)print(number)count = 0while count <7:    guess = int(input("请输入一个1至100的随机数："))    count = count + 1    if guess > number :        print("猜大了")    elif guess < number:        print("猜小了")    elif guess == number:        print("猜对了")        break    # if count != 7:    #     continue    # else:    #     print("错误次数用光了")#可直接在while平级加else，while循环正常结束后会直接执行else中代码else:    print("错误次数用光了")

3、continue

number = 0while number < 10:    number = number + 1    if number%2==0:        continue    print(number)

4、for循环、print、字符串输出import datetimefor i in range(4):    print("第",i+1,"次循环",sep="") #print 多个连接必须用sep作为间隔符print("-----------------------")#字符串格式化username = ‘linqian‘date = datetime.datetime.today()print(type(date))# msg = ‘欢迎‘+username+‘登录，‘+‘今天是‘+datemsg2 = ‘欢迎%s登录，今天是%s‘ %(username,date)# print(msg)print("-----------------------")print(msg2)

原文地址：https://www.cnblogs.com/lqcjlu/p/11371721.html