---
title: 訓練場_3
tags: 訓練場
---
[👉 程式繳交處](https://hackmd.io/@futurenest/code_training_stu_3)
## for 迴圈
```python
for 變數名稱 in range (起始值, 結束值, 遞增值) :
想重複執行的動作
```
## 試看看
### for loop
```python
# 1
for i in [1, 2, 3]:
print(i)
```
```python
# 2
for i in [1, 2, 3]:
print(i + 1)
```
```python
# 3
for _ in [1, 2, 3]:
print('hi')
```
```python
# 4
for i in [1, 2, 3, 4, 5, 6, 7, 8]:
if i % 2 == 0:
print(i)
```
```python
# 5
for i in 'hello':
print(i)
```
### Range
```python
# 1
for i in range(5):
print(i)
```
```python
# 2
for i in range(1, 5):
print(i)
```
```python
# 3
for i in range(1, 10, 2):
print(i)
```
```python
# 4
for i in range(10, -1, -1):
print(i)
```
---
### 練習
#### 1. 從 1 顯示到 49
---
#### 2. 顯示出 1-10 的平方數
---
#### 3. 印出下列圖形（1）
```
*
**
***
****
*****
```
---
#### 4. 印出下列圖形（2）
```
*****
****
***
**
*
```
---
#### 5. 九九乘法表(1)
請設計讓使用者輸入一個數字，並顯示出該數字乘上 1 ~ 9 的乘法表。
---
#### 6. 九九乘法表(2)
承上題，
請試著找出文字格式的規律，並試著顯示出乘法表。
需注意輸入數字未介於 1~9 時，
應顯示 “wrong”。
```
2 x 1 = 2
2 x 2 = 4
2 x 3 = 6
2 x 4 = 8
2 x 5 = 10
2 x 6 = 12
2 x 7 = 14
2 x 8 = 16
2 x 9 = 18
```
---
#### 7. 九九乘法表(3)
請完成九九乘法表。
(不同的被乘數中間要有空白列)
```
1 x 1 = 1
1 x 2 = 2
1 x 3 = 3
1 x 4 = 4
1 x 5 = 5
1 x 6 = 6
1 x 7 = 7
1 x 8 = 8
1 x 9 = 9
2 x 1 = 2
2 x 2 = 4
2 x 3 = 6
2 x 4 = 8
2 x 5 = 10
2 x 6 = 12
2 x 7 = 14
2 x 8 = 16
2 x 9 = 18
3 x 1 = 3
3 x 2 = 6
3 x 3 = 9
3 x 4 = 12
3 x 5 = 15
3 x 6 = 18
3 x 7 = 21
3 x 8 = 24
3 x 9 = 27
4 x 1 = 4
4 x 2 = 8
4 x 3 = 12
4 x 4 = 16
4 x 5 = 20
4 x 6 = 24
4 x 7 = 28
4 x 8 = 32
4 x 9 = 36
5 x 1 = 5
5 x 2 = 10
5 x 3 = 15
5 x 4 = 20
5 x 5 = 25
5 x 6 = 30
5 x 7 = 35
5 x 8 = 40
5 x 9 = 45
6 x 1 = 6
6 x 2 = 12
6 x 3 = 18
6 x 4 = 24
6 x 5 = 30
6 x 6 = 36
6 x 7 = 42
6 x 8 = 48
6 x 9 = 54
7 x 1 = 7
7 x 2 = 14
7 x 3 = 21
7 x 4 = 28
7 x 5 = 35
7 x 6 = 42
7 x 7 = 49
7 x 8 = 56
7 x 9 = 63
8 x 1 = 8
8 x 2 = 16
8 x 3 = 24
8 x 4 = 32
8 x 5 = 40
8 x 6 = 48
8 x 7 = 56
8 x 8 = 64
8 x 9 = 72
9 x 1 = 9
9 x 2 = 18
9 x 3 = 27
9 x 4 = 36
9 x 5 = 45
9 x 6 = 54
9 x 7 = 63
9 x 8 = 72
9 x 9 = 81
```
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