How to convert a base-26 string to an integer?
<p>I have a string "D", that I want to convert into the integer 4.</p>

<p><em>(Additional information from OP)</em></p>

<p>D should convert into a decimal value . I want it to be "4".</p>

<p>for D = "4" ; E = "5"; and so on...</p>

<p>It may have the combination . If AA comes ,the value should be 27 and ll increase consequetively.</p>
