How to create an IF statement based on first two characters of a cell

[tonguencheek]

Hey everyone - how would I create an IF statement that looks at the first two text characters of a particular cell?

 

[Andrew Poulsom]

Example:

=IF(LEFT(A1,2)="AB","OK","Not OK")

 

[tonguencheek]

Great - thanks!

 

[steve hill]

Example:

=IF(LEFT(A1,2)="AB","OK","Not OK")

can this be extended I have four returned options based on the first character in column A

thanks
Steve