编写一个python程序,打印出10行的杨辉三角
时间: 2023-05-13 11:06:48 浏览: 50
以下是Python程序,可以打印出10行的杨辉三角:
```python
def print_pascal_triangle(n):
# 初始化第一行
row = [1]
# 循环n次,打印前n行
for i in range(n):
# 打印当前行
print(row)
# 计算下一行
row = [1] + [row[j] + row[j+1] for j in range(len(row)-1)] + [1]
print_pascal_triangle(10)
```
输出结果:
```
[1]
[1, 1]
[1, 2, 1]
[1, 3, 3, 1]
[1, 4, 6, 4, 1]
[1, 5, 10, 10, 5, 1]
[1, 6, 15, 20, 15, 6, 1]
[1, 7, 21, 35, 35, 21, 7, 1]
[1, 8, 28, 56, 70, 56, 28, 8, 1]
[1, 9, 36, 84, 126, 126, 84, 36, 9, 1]
```
相关问题
编写一个Python程序,打印出10行杨辉三角。
以下是打印杨辉三角的Python程序:
```python
n = 10 # 打印10行杨辉三角
triangle = [[1] * (i+1) for i in range(n)]
for i in range(2, n):
for j in range(1, i):
triangle[i][j] = triangle[i-1][j-1] + triangle[i-1][j]
for row in triangle:
print(row)
```
输出结果如下:
```
[1]
[1, 1]
[1, 2, 1]
[1, 3, 3, 1]
[1, 4, 6, 4, 1]
[1, 5, 10, 10, 5, 1]
[1, 6, 15, 20, 15, 6, 1]
[1, 7, 21, 35, 35, 21, 7, 1]
[1, 8, 28, 56, 70, 56, 28, 8, 1]
[1, 9, 36, 84, 126, 126, 84, 36, 9, 1]
```
每一行的数字表示杨辉三角中的一个数,第n行有n个数。第一行只有一个数1,第二行有两个数1,第三行有三个数1,中间是2,以此类推。每个数字都等于它上方两个数字之和。
编写一个python程序打印出十行的杨辉三角
好的,以下是打印十行杨辉三角的Python程序:
```python
n = 10 # 打印10行杨辉三角
# 初始化杨辉三角的第一行
row = [1]
# 循环打印每一行
for i in range(n):
# 打印当前行
print(row)
# 初始化下一行
next_row = [1]
# 计算下一行中间部分的数字
for j in range(len(row) - 1):
next_row.append(row[j] + row[j + 1])
# 添加下一行的最后一个数字
next_row.append(1)
# 更新当前行为下一行
row = next_row
```
输出结果为:
```
[1]
[1, 1]
[1, 2, 1]
[1, 3, 3, 1]
[1, 4, 6, 4, 1]
[1, 5, 10, 10, 5, 1]
[1, 6, 15, 20, 15, 6, 1]
[1, 7, 21, 35, 35, 21, 7, 1]
[1, 8, 28, 56, 70, 56, 28, 8, 1]
[1, 9, 36, 84, 126, 126, 84, 36, 9, 1]
```