subprogram

noun
UK /ˈsʌbˌprəʊɡræm/
US /ˈsʌbˌproʊɡræm/

A subprogram is a small part of a bigger computer program that does one job.

The programmer wrote a subprogram to add up all the numbers.


OTHER MEANINGS

2. A smaller program that is part of a larger program or system.

The main program calls a subprogram to print the report.

3. A routine that can be used many times in different places in a program.

She saved time by reusing the same subprogram in several projects.

4. A block of code that performs a specific task and returns a result.

The subprogram checks whether the password is correct.