python基礎--for循環.md

# 打印空心三角形
# n = 10
# for i in range(1,n+1):
#     for m in range(n-i):
#         print(' ',end='')
#     for j in range(i):
#         if j == 0 or j == i-1 or i ==n:
#             print('*',end=' ')
#         else:
#             print('  ',end='')
#     print()


    * 
   * * 
  *   * 
 *     * 
* * * * * 





# 打印空心正方形
n = 5
for i in range(n):
    print('* ',end='')
    if i ==0 or i ==n-1:
        print('* ' * (n-2),end='')
    else:
        print('  ' * (n-2),end='')
    print('*')
    
    
* * * * *
*       *
*       *
*       *
* * * * *


# 求100-999之間的水仙花數
for i in range(100,1000):
    a = i//100
    b = i//10%10
    c = i %10
    if a**3+b**3+c**3==i:
        print(i)