[填空题] 设有以下函数过程：Function fun(m As Integer) As Integer Dim k As Integer, sum As Integer sum = 0 For k

[填空题] 设有以下函数过程：Function fun(m As Integer) As Integer Dim k As Integer, sum As Integer sum = 0 For k = m To 1 Step -2sum = sum + k Next kfun = sumEnd Function若在程序中用语句s=fun(10)调用此函数，则s的值为 _________。