1.三角形

n=9
for i in range(n):
    for j in range(i):
        print('',end='')
    for k in range(i,n):
        print('*',end='')
    print()

# while迴圈

i = 0
while i < 10:
    j = 0
    while j <= i:
        print("*", end="")
        j += 1
    print("")
    i += 1

2.九九乘法表

i=0
while i<9:

    j
 
=0
    while j<=i:
        print("%d*%d=%d\t"%(j+1, i+1, (j+1)*(i+1)),end="")
        j+=1
    print("")
    i+=1

for迴圈和上面一樣

for i in range(1, 10):
    for j in range(1, i + 1):
        print('%s×%s=%s'%(i,j,i*j), end=" ")  #end= 以。。。結尾
    print()

3.使用for迴圈輸出數字0-9，當數字為6時，跳出本次迴圈，執行其他迴圈
# 當數字為8的時候，停止迴圈

var=10
while var>0:
     var=var-1
     if var ==6:
         continue    跳出本次迴圈
     print(var)
 var=10

var=10
while var>0:
    var=var-1
    if var ==8:
        break   終止迴圈
    print(var)

4使用迴圈 計算出1-100之間 所有基數的和，偶數和

sum=0
i=0
while i<101:
    sum=sum+i
    i=i+1
print(sum)

sum=0
i=0
while i<101:
    sum=sum+i
    i
 
=i+2
print(sum)

sum = 0
n = 99
while n > 0:
  sum = sum + n
  n = n - 2
print(sum)

模擬ATM取錢系統，取款機裡一共有10000元， # 有五個人分別去取錢，每次取錢的金額在100元到500元之間， # 要求輸出他們每次取錢的金額，以及ATM機裡的餘額， # 當餘額小於取款的金額時，退出系統

import random
import os
import threading
import time
from threading import Thread, Lock

lock = Lock()
meon = 10000


def a(i):
    while True:
        global meon
        time.sleep(1)
        lock.acquire()
        mon = random.randint(100, 500)
        if mon <= meon:
            meon -= mon
            print("%s取了%d,剩餘%d" % (i, mon, meon))
        else:
            print("餘額不足,退出系統")
            os._exit(0)
        lock.release()


if __name__ == '__main__':
    list = ["小張", "小王", "小劉", "小李", "小盛"]
    for i in list:
        t = threading.Thread(target=a, args=(i,))
        t.start()