With the help of an example explain sequential code and block code.

Sequential Code: Numbers and/or letters are assigned in consecutive order. These codes are applied primarily to source documents such as cheques, invoices etc. A sequential code can facilitate document searches. This process enables in either identification of missing codes relating to a particular document or a relevant document can be traced on the basis of codes. Example: Code Account CL001 SCERT Ltd Block Code: In a block code a range of numbers is partitioned into a desired number of sub-ranges and each sub-range is allotted to a specific group. In most of the users. Block codes, numbers within a sub range follow a sequential coding scheme. Numbers increase consecutively. Example: A dealer code, for trading firms. Codes Dealers $\displaystyle 100$-$\displaystyle 199$ Small pumps