[填空题] 设有以下函数过程：Function fun(m As Integer)As IntegerDim k As Integer, sum As Integersum=0For k=m To 1

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