Prevent case sensitivity in formula

Question

I was struck at a point where I want to populate a formula field in an object based on the billing state. I've tried below formula and it worked.

CASE( BillingState,
'AP', 'IST',
'TL', 'IST',
'ALASKA', 'EST',''
)

The field is taking only upper case letters. I want my field to accept values both in upper and lower case. Can someone help me on what needs to be added to my code snippet.

Thanks in Advance...

Answer 1

I think using the UPPER() formula would do the job: https://help.salesforce.com/articleView?id=customize_functions_i_z.htm&type=5

CASE( UPPER(BillingState),
'AP', 'IST',
'TL', 'IST',
'ALASKA', 'EST',''
)