while循环语句

# while循环
# 通过while循环，计算1到100的总和
num = 1
sum = 0
while num <= 100:sum = num + sumnum += 1
print(f"1到100的和为{sum}")
#嵌套语句--实现猜1-10数字游戏
import random
flag=True
num=random.randint(1,10)
while flag:guess_num=int(input("请输入你猜想的数字:"))if guess_num==num:print("你猜中了！")flag=Falseelse:if guess_num<num:print("你猜小了")else:print("你猜大了")

# 1-9的乘法口诀表
i=1
while i<=9:j=1while j<=i:print(f"{j}*{i}={j*i}",end=" ")j+=1print("\t")i+=1
print("以上就是1-9的乘法口诀表请查收！")

for循环

# for循环
# for 变量 in 被处理的数据name="Hello"
for x in  name:print(x,end=",")

count_y=0
str= "t\pystudyenv\Scripts\python.exe D:/yt/pystudy/venv/day03.py"
for x in  str:print(x,end=",")if x=="y":count_y+=1
print("\t")
print(f"这个字符串中共有字母y{count_y}个")

 

 

# range 语法
# 从1-5不包括5的所有数字
r=range(1,5)
print(r)
for x in r:print(x)