You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
66 lines
1.4 KiB
66 lines
1.4 KiB
"""
|
|
File: iteration.py
|
|
Created Time: 2023-08-24
|
|
Author: krahets (krahets@163.com)
|
|
"""
|
|
|
|
|
|
def for_loop(n: int) -> int:
|
|
"""for 迴圈"""
|
|
res = 0
|
|
# 迴圈求和 1, 2, ..., n-1, n
|
|
for i in range(1, n + 1):
|
|
res += i
|
|
return res
|
|
|
|
|
|
def while_loop(n: int) -> int:
|
|
"""while 迴圈"""
|
|
res = 0
|
|
i = 1 # 初始化條件變數
|
|
# 迴圈求和 1, 2, ..., n-1, n
|
|
while i <= n:
|
|
res += i
|
|
i += 1 # 更新條件變數
|
|
return res
|
|
|
|
|
|
def while_loop_ii(n: int) -> int:
|
|
"""while 迴圈（兩次更新）"""
|
|
res = 0
|
|
i = 1 # 初始化條件變數
|
|
# 迴圈求和 1, 4, 10, ...
|
|
while i <= n:
|
|
res += i
|
|
# 更新條件變數
|
|
i += 1
|
|
i *= 2
|
|
return res
|
|
|
|
|
|
def nested_for_loop(n: int) -> str:
|
|
"""雙層 for 迴圈"""
|
|
res = ""
|
|
# 迴圈 i = 1, 2, ..., n-1, n
|
|
for i in range(1, n + 1):
|
|
# 迴圈 j = 1, 2, ..., n-1, n
|
|
for j in range(1, n + 1):
|
|
res += f"({i}, {j}), "
|
|
return res
|
|
|
|
|
|
"""Driver Code"""
|
|
if __name__ == "__main__":
|
|
n = 5
|
|
res = for_loop(n)
|
|
print(f"\nfor 迴圈的求和結果 res = {res}")
|
|
|
|
res = while_loop(n)
|
|
print(f"\nwhile 迴圈的求和結果 res = {res}")
|
|
|
|
res = while_loop_ii(n)
|
|
print(f"\nwhile 迴圈（兩次更新）求和結果 res = {res}")
|
|
|
|
res = nested_for_loop(n)
|
|
print(f"\n雙層 for 迴圈的走訪結果 {res}")
|