How can add loop value (dynamic) in variable

Dear all,

Kindly let me know how can we add loop value in our variable as shown below?

"i" is loop value while changed_attributes is the variable.

when i write it like below it throws error.

	FOR i in 1..p_loop_cnt
	loop
		dbms_output.put_line('how data appears '|| changed_attributes(i).shipped_quantity);

Thanks