for i in range(1,10,2): s=“*” *i print (s.center ()
时间: 2023-12-18 19:04:25 浏览: 17
这段代码有一些语法错误。可以尝试在交互式解释器中执行以下代码,以查看错误信息并进行修复:
```
for i in range(1, 10, 2):
s = "*" * i
print(s.center(10))
```
这段代码的作用是打印出一组金字塔形状的星号,每行星号数量递增2个。输出结果如下:
```
*
***
*****
*******
*********
```
相关问题
for i in range(1, 10, 2): s = "*" * i print(s.center(9,’’))
这段代码的作用是打印一个菱形,其中菱形的上半部分由奇数个星号组成,下半部分由偶数个星号组成。
具体解释如下:
- `range(1, 10, 2)` 生成一个从1开始,步长为2,到9结束的整数序列,即[1, 3, 5, 7, 9]。
- 对于每一个数字i,都创建一个由i个星号组成的字符串s。
- 使用字符串的`center()`方法将s居中放置在一个宽度为9的字符串中,用空格填充剩余位置,然后打印出来。
这样就能够得到一个菱形的形状了。
def size1(n): result = "" for i in range(n): result = "".rjust(2 * i + 1, "*") + "\n" return result
The function size1(n) appears to be incomplete and contains errors. Here is a revised version of the function that will return a string of asterisks (*) arranged in a pyramid shape:
```
def size1(n):
result = ""
for i in range(1, n + 1):
row = "* " * i
result += row.center(n * 2 - 1) + "\n"
return result
```
Explanation:
1. `result = ""` initializes an empty string that will be used to store the pyramid.
2. `for i in range(1, n + 1):` loops through the numbers 1 to n (inclusive).
3. `row = "* " * i` creates a string of asterisks and spaces, with i asterisks and i - 1 spaces.
4. `result += row.center(n * 2 - 1) + "\n"` centers the row string in a field of width n * 2 - 1 (to account for the spaces between asterisks), adds a newline character at the end, and appends it to the result string.
5. `return result` returns the completed pyramid string.
Example usage:
```
>>> print(size1(5))
*
* *
* * *
* * * *
* * * * *
```
Note that the pyramid is centered and has a base width of n * 2 - 1.