How can I write more than one subscript!

I want to know how can I write the subscripts in the following form:

f_(T,0) where T (Capital),0 are subscripts.

Thanks in advance.

Answer 1

[Will F]

Simply use braces: f_{(T,0)}

Answer 2

[Kunika]

f_(T,0)

Answer 3

[Kunika]

f_{(T,0)}