How to iterate through arrays?

Hi there,

I'm trying to iterate through arrays in PL/PGSQL:
....DECLARE    update_query CHAR;    update_query_params CHAR ARRAY[6];BEGIN        update_query_params[1]:='some
text';                       RAISE NOTICE 'Testing element %', update_query_params[1];END
 
.....


It does not 'compile'... :-(. Can you tell me what is the problem?

Thanks,
Nosy