Obtain the serial number in the sap abap programming Program

Data: lv_curno type num10.

Call function 'Number _ get_next'
Exporting
Nr_range_nr = '00'
Object = 'zoa _ lognum'
Importing
Number = lv_curno
Exceptions
Interval_not_found = 1
Number_range_not_intern = 2
Object_not_found = 3
Quantity_is_0 = 4
Quantity_is_not_1 = 5
Interval_overflow = 6
Buffer_overflow = 7
Others = 8.

If sy-subrc <> 0.
 
Else.

Call function 'conversion _ exit_alpha_input'
Exporting
Input = lv_curno
Importing
Output = lv_curno.
Endif.

Write lv_curno.

Obtain the serial number in the sap abap programming Program