def size1(n): for i in range(n): print("".rjust(2*i+1,"*")) 这种怎么用return

这个函数可以使用return来返回一个字符串，而不是直接打印出来。例如：

def size1(n):
result = ""
for i in range(n):
result += "".rjust(2*i + 1, "*") + "\n"
return result

print(size1(5))

输出：

*
***
*****
*******
*********

相关问题

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.

一个数如果恰好等于它的所有因子(不包括它自己)之和，就称其为完数，比如6=1+2+3。输出n之内的全部“完数”，n从键盘上输入。这里保证输入的n值是正整数，读者无需考虑。 输出中，每个数占的宽度为6,右对齐

完数是指一个数恰好等于其除自身以外的所有因数之和。我们可以编写一个程序来找出指定范围内(n以内)的所有完数。首先，我们需要遍历从2到n，对于每一个数，计算其因数之和，如果这个和正好等于该数本身，则将其添加到结果列表中。

下面是一个简单的Python代码示例，用于找到并输出n范围内的完数：

def find_perfect_numbers(n):
    perfect_numbers = []
    for num in range(2, n + 1):
        factors_sum = sum(i for i in range(1, num) if num % i == 0)
        if factors_sum == num:
            perfect_numbers.append(str(num).rjust(6))  # 右对齐，宽度为6
    return perfect_numbers

# 用户输入n值
n = int(input("请输入n的值："))
perfects_in_range = find_perfect_numbers(n)
print("在{}内的完数有：".format(n))
for perfect in perfects_in_range:
    print(perfect)