No, don't do that.
Strings are char arrays, thus the number there is a index of the array which refers to a single char.
You can't compare chars with strings that way, use something like
this instead.
Using an string index with PrintTo* is a special case i won't explain here, more info below.
Before you continue, please head over
here and read how strings in SourcePawn work.
Yours sincerely
Impact