key = Val (Text1. Text)
i=1:j=10
Text2. Text = "”
Do While i< = j
m = Int((i +j)/2+0.5)
If key = a(m) Then Exit Do
If key < a(m) Then j =m-1 Else i=m+1
Text2.Text = Text2.Text + Str (a (m))
Loop
数组元素a(1)到a(10)的值依次为“1,2,3,4,5,6,7,8,9,10",文本框Text1中输入的值是4,执行该程序段,文本框Text2中显示的是( )