打印左箭头数字图案的Python程序

编写一个Python程序，使用for循环来打印左箭头数字模式。

rows = int(input("Enter Left Arrow of Numbers Pattern Rows = "))

print("====The Left Arrow Numbers Pattern====")

for i in range(rows, 0, -1): for j in range(i, 0, -1): print(j, end = ' ') print()

for i in range(2, rows + 1): for j in range(i, 0, -1): print(j, end = ' ') print()

这个Python例子使用一个while循环来打印数字的模式的左箭头。

rows = int(input("Enter Left Arrow of Numbers Pattern Rows = ")

print("====The Left Arrow Numbers Pattern====") i = rows

while(i >= 1): j = i while(j >= 1): print(j, end = ' ') j = j - 1 print() i = i - 1

i = 2  
while(i <= rows): j = i while(j >= 1): print(j, end = '' ) j = j - 1 print() i = i + 1  

Enter Left Arrow of Numbers Pattern Rows = 12
====The Left Arrow Numbers Pattern====
12 11 10 9 8 7 6 5 4 3 2 1 
11 10 9 8 7 6 5 4 3 2 1 
10 9 8 7 6 5 4 3 2 1 
9 8 7 6 5 4 3 2 1 
8 7 6 5 4 3 2 1 
7 6 5 4 3 2 1 
6 5 4 3 2 1 
5 4 3 2 1 
4 3 2 1 
3 2 1 
2 1 
1 
2 1 
3 2 1 
4 3 2 1 
5 4 3 2 1 
6 5 4 3 2 1 
7 6 5 4 3 2 1 
8 7 6 5 4 3 2 1 
9 8 7 6 5 4 3 2 1 
10 9 8 7 6 5 4 3 2 1 
11 10 9 8 7 6 5 4 3 2 1 
12 11 10 9 8 7 6 5 4 3 2 1