写一个函数要求输入一个正整数n计算1+1/3+1/5+……的前n项和

用VB写的话：

Private Sub Form_Click()
Dim i As Integer, n As Integer, s As Single
n = Val(InputBox("请输入一个正整数：", , 10))
For i = 1 To n
s = s + 1! / (2 * i - 1)
Next
MsgBox "前" & n & "项之和为" & s
End Sub本回答被提问者采纳

请问，s = s + 1! / (2 * i - 1)中的！是什么意思，求阶乘吗