# wk05_1005_Loop
1. range 函式
-認識 range 函式
-range 函式的語法
2. for 迴圈
-巢狀 for 迴圈
-break 命令
-continue 命令
3. while 迴圈
## {inclass_practice}
```python
print("**" * 3)
print("i love u. \n " * 3)
```
******
i love u.
i love u.
i love u.
```python
print("*" * 1)
print("*" * 2)
print("*" * 3)
print("*" * 4)
print("*" * 5)
```
*
**
***
****
*****
```python
for i in [1, 2, 3, 4, 5] :
print("@" * i)
```
@
@@
@@@
@@@@
@@@@@
```python
a1 = 100
a2 = 100
a3 = 80
# 不同方式的資料儲存
a_list = [100, 100, 80]
# 從零開始
print(a1, a2, a3)
print(a_list)
print(a_list[0])
```
100 100 80
[100, 100, 80]
100
```python
# 1加到3
n = 3
ttl = 0+1
ttl = ttl + 2
ttl = ttl + 3
print(ttl)
```
6
```python
n = 3
ttl = 0
# 乘法不能用 0
for i in[1,2,3,4,5,6,7,8,9,10] :
ttl = ttl + i
print(ttl)
```
55
```python
print(list(range(5)))
print(list(range(3, 10)))
print(type(range(5)))
print(type(list(range(3, 10))))
```
[0, 1, 2, 3, 4]
[3, 4, 5, 6, 7, 8, 9]
<class 'range'>
<class 'list'>
```python
n = 1000
ttl = 0
for i in range(1, 1001) :
ttl = ttl + i
print(ttl)
```
500500
```python
n = 2000000
ttl = 0
for i in range(1, 2000001) :
ttl = ttl + i
print(ttl)
```
2000001000000
```python
n = int(input("n?"))
ttl = 0
for i in range(1, n+1) :
ttl = ttl + i
print(ttl)
```
n?10
55
```python
n = int(input("n?"))
ttl = 0
for i in range(1, n+1, 2) :
ttl = ttl + i
print(ttl)
```
n?10
25
```python
n = int(input("n?"))
ttl = 0
for i in range(1, n+1) :
if i%7 == 0 and i%11 == 0 :
ttl = ttl + i
print(ttl)
```
n?1000000
6493993506
```python
a = 9
b = 9
for j in range(2, 9+1) :
print("這是",j,"的乘法")
for i in range(1, 9+1) :
print(j, "*", i, "=", j * i)
#print("2*1 = 2")
#print("2*2 = 4")
#print("2*9 = 18")
```
這是 2 的乘法
2 * 1 = 2
2 * 2 = 4
2 * 3 = 6
2 * 4 = 8
2 * 5 = 10
2 * 6 = 12
2 * 7 = 14
2 * 8 = 16
2 * 9 = 18
這是 3 的乘法
3 * 1 = 3
3 * 2 = 6
3 * 3 = 9
3 * 4 = 12
3 * 5 = 15
3 * 6 = 18
3 * 7 = 21
3 * 8 = 24
3 * 9 = 27
這是 4 的乘法
4 * 1 = 4
4 * 2 = 8
4 * 3 = 12
4 * 4 = 16
4 * 5 = 20
4 * 6 = 24
4 * 7 = 28
4 * 8 = 32
4 * 9 = 36
這是 5 的乘法
5 * 1 = 5
5 * 2 = 10
5 * 3 = 15
5 * 4 = 20
5 * 5 = 25
5 * 6 = 30
5 * 7 = 35
5 * 8 = 40
5 * 9 = 45
這是 6 的乘法
6 * 1 = 6
6 * 2 = 12
6 * 3 = 18
6 * 4 = 24
6 * 5 = 30
6 * 6 = 36
6 * 7 = 42
6 * 8 = 48
6 * 9 = 54
這是 7 的乘法
7 * 1 = 7
7 * 2 = 14
7 * 3 = 21
7 * 4 = 28
7 * 5 = 35
7 * 6 = 42
7 * 7 = 49
7 * 8 = 56
7 * 9 = 63
這是 8 的乘法
8 * 1 = 8
8 * 2 = 16
8 * 3 = 24
8 * 4 = 32
8 * 5 = 40
8 * 6 = 48
8 * 7 = 56
8 * 8 = 64
8 * 9 = 72
這是 9 的乘法
9 * 1 = 9
9 * 2 = 18
9 * 3 = 27
9 * 4 = 36
9 * 5 = 45
9 * 6 = 54
9 * 7 = 63
9 * 8 = 72
9 * 9 = 81
## {afterclass_practice}
### 1.執行下列程式，下列結果何者正確？
list1 = range(5)
print(list(list1))
(A) [1, 2, 3, 4] (B) [ 1, 2, 3, 4,5]
(C) [0, 1, 2, 3, 4] (D) [0, 1, 2, 3, 4,5]
```python
list1 = range(5)
print(list(list1))
```
[0, 1, 2, 3, 4]
ans : (C)
### 2.執行下列程式，下列結果何者正確？
list1=range(6,0,-2)
print(list(list1))
(A) [6, 4, 2] (B) [6, 0, -2] (C) [6, 4, 2, 0] (D) [6, 4, 2, 0, -2]
```python
list1=range(6,0,-2)
print(list(list1))
```
[6, 4, 2]
ans : (A)
### 3.執行下列程式，結束迴圈後，n 的值為多少？
for n in range(1,5,2):
print(n,end=" ")
print("結束迴圈後 n=",n)
(A) 1 (B) 3 (C) 5 (D) 7
```python
for n in range(1,5,2):
print(n,end=" ")
print("結束迴圈後 n=",n)
```
1 3 結束迴圈後 n= 3
ans : (B)
### 4.執行 for 廻圈時，如果想要提前離開廻圈，應使用何種指令？
(A) break (B) return (C) exit (D) pause
ans : (A)
### 5.執行下列程式，下列結果何者正確？
list1 = range(5,-1,-2)
print(list(list1))
(A) [5,-1,-2] (B) [ 5,4,3,2,1,0,-1] (C) [5, 3, 1] (D) [5,3,1,-1]
```python
list1 = range(5,-1,-2)
print(list(list1))
```
[5, 3, 1]
ans : (C)
### 6.while 廻圈若一開始測試條件就不成立，則 while 內程式區塊將會如何處理？
(A) 執行一次 (B) 一次都不執行 (C) 重複執行 (D) 編譯錯誤
ans : (B)
### 7.下列那一個指令可在廻圈中跳過後面的敘述直接回到廻圈的開頭？
(A) exit (B) return (C) pause (D) continue
ans : (D)
### 8.執行下列程式，結束迴圈後，sum 的值為多少？
sum = 0
n=8
for i in range(1, n+1,2):
sum += i
print(sum)
(A) 8 (B) 9 (C) 16 (D) 28
```python
sum = 0
n=8
for i in range(1, n+1,2):
sum += i
print(sum)
```
16
ans : (C)
### 9.執行下列程式，可看到多少個「#」字？
n=5
for i in range(1,n):
for j in range(1,i+1):
print("#", end="")
print()
(A) 5 (B) 6 (C) 7 (D) 10
```python
n=5
for i in range(1,n):
for j in range(1,i+1):
print("#", end="")
print()
```
#
##
###
####
ans : (D)
### 10.執行下列程式，結束迴圈後，total 的值為多少？
total = i = 1
n=5
while(i<=n):
total *= i
i+=1
print(total)
(A) 5 (B) 24 (C) 120 (D) 720
```python
total = i = 1
n=5
while(i<=n):
total *= i
i+=1
print(total)
```
120
ans : (C)
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