PRGM : The PRGM command is used to execute other programs from the currently running program as subroutines. Syntax and accepted input is same as the EXEC command.

syntax: PRGM <program name>

PRGM is used to execute other calculator programs as subroutines. All calculator program files must have the extension ".prg" The name of the program passed to the PRGM command is simply the file name excluding the extension, so if you want to execute the program in the file "sample.prg" as a subroutine in your main program for example, you enter "PRGM sample" as the instruction in your main program file.