Multiple case statements

How can i use multiple case statements? Or is there any alternative?

My problem is:

I have to give a min. and max range in the workbook. If the user select min as 2 and max as 5 then the function should work within the range 'case 2' and 'case 5' (ie. case 2, 3, 4 & 5) should work.

case 1
function()

case 2
function ()

Case 3
function ()

case 4
function ()

Case 5
function ()

case 6
function ()