# 不知道該下啥標題
---
# 迴圈中奇怪的東西
----
# range()
----
```python
for i in range():
...
```
----
#### 生成一個等差數列
```python
a=list(range(5, 10))#[5, 6, 7, 8, 9]
b=list(range(0, 10, 3))#[0, 3, 6, 9]
c=list(range(-10, -100, -30))#[-10, -40, -70]
```
----
# continue
----
## continue可以將迴圈推回起點，但其中的值不會變動
----
```python
for num in range(2, 10):
if num % 2 == 0:
print("找到一個偶數", num)
continue
print("找到一個奇數", num)
```
----
# break
----
## break可以直接中斷整個迴圈
----
## break example
```python
for n in range(2, 10):
for x in range(2, n):
if n % x == 0:
print(n, '等於', x, '*', n//x)
break
else:
print(n, '是一個質數')
```
----
#### 對，你沒看錯，這不是錯誤程式碼，else確實隸屬於for
----
# for...else
----
### 在 for 迴圈中，else子句會在迴圈完成後執行。
```python
for i in range(10):
print(i)
else:
print("完整迴圈結束執行")
```
----
### 也就代表，只要中斷迴圈循環，就不會觸發else子句
```python
for i in range(10):
print(i)
break
else:
print("完整迴圈結束執行")
```
----
# while...else
----
### 在 while 迴圈中，它會在迴圈條件變為 false 後執行。
```python
a=0
while a<10:
print(a)
a+=1
else:
print("變數a>=10")
```
----
### 相同的，中斷迴圈後，就不會觸發else子句
```python
a=0
while a<10:
print(a)
a+=1
else:
print("變數a>=10")
```
---
## 更多奇怪的東西
----
# pass
----
### 如同字面意思->跳過
```python
for i in range(10):
pass
print("嗨")
```
----
## 有什麼用?
* 為程式做預留
* 製作一個框架
* anymore?
----
# match
----
## 同個變數的多次比較
----
```python
status=int(input())
if status==400:
print("Bad request")
elif status==401:
print("Unauthorized")
elif status==403:
print("forbidden")
elif status==404:
print("Not found")
elif status==418:
print("I'm a teapot")
else:
print("Something's wrong with the internet")
```
----
```python
status = int(input())
match status:
case 400:
print("Bad request")
case 401:
print("Unauthorized")
case 403:
print("forbidden")
case 404:
print("Not found")
case 418:
print("I'm a teapot")
case _:
print("Something's wrong with the internet")
```
---
## 一個小觀念
----
# =(賦值)
##### 他不是等於(==)歐~
----
```python
a = ["柯o哲","侯o宜","郭o銘","賴o德"]
b = a
print(a) #["柯o哲","侯o宜","郭o銘","賴o德"]
print(b) #["柯o哲","侯o宜","郭o銘","賴o德"]
```
----
```python
del b[2] # 刪除 b list 中第三個元素 "郭o銘"
print(a) #["柯o哲","侯o宜","賴o德"]
print(b) #["柯o哲","侯o宜","賴o德"]
```
----
```python
a = ["柯o哲","侯o宜","郭o銘","賴o德"]
b = a
print(id(a))
print(id(b))
```
----
```py
a = ["柯o哲","侯o宜","郭o銘","賴o德"]
b = a.copy()
```
----
[詳細解釋](https://www.796t.com/content/1545161954.html)
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