what is use of pr and mi format model in to_char function in oracle database

Question

Oracle Database 11g SQL

Answer 1

PR; Returns negative value in <angle brackets>.

Returns positive value with a leading and trailing blank.

Restriction: The PR format element can appear only in the last position of a number format model.

MI; Returns negative value with a trailing minus sign (-).

Returns positive value with a trailing blank.

Restriction: The MI format element can appear only in the last position of a number format model.