What does subprogram mean?
A subprogram is a routine within a larger computer program that performs a particular task and can be invoked by other parts of that program. It may handle a specialized operation, such as sorting records, validating a password, or performing calculations, while returning a result to the calling code. The term is chiefly used in programming and software engineering, although its exact boundaries vary between programming languages and textbooks. “Subprogram” is broad, whereas “subroutine,” “procedure,” and “function” may carry more specific technical meanings. Organizing a program into subprograms can make tasks easier to test, reuse, and maintain. The word is especially associated with structured programming, in which larger procedures are divided into smaller, clearly defined units rather than being written as one continuous sequence of instructions.
nounA routine within a computer program that can be invoked to perform a defined task. A subprogram may be called by a main program or by another subprogram and may be designed to serve different purposes.
- A callable routine within a larger computer program that performs a defined task.
"The password-validation subprogram is called whenever a user signs in."
"The program uses a sorting subprogram to arrange the search results."
"During testing, the engineers discovered that the error originated in an encryption subprogram."
The standard plural is formed by adding “-s” to the end of the word.
"The two subprograms share the same data-validation routine."
A subprogram is programming's equivalent of a helper: one routine calling another to get a job done.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does subprogram come from?
“Subprogram” is a modern compound formed from the prefix “sub-” and the word “program.” The English word “program” entered through French from Latin “programma,” itself borrowed from Greek, and came to be widely associated with computer programs during the twentieth century. In that computing context, “subprogram” developed to designate a smaller program unit capable of being called from a larger program.
How subprogram is actually used
This is primarily a technical term in programming and software engineering. It overlaps with terms such as “subroutine,” “procedure,” and “function,” but the precise usage can vary by programming language and context.
Easily confused with subprogram
A subprogram is the broader term for any callable unit within a program, while a subroutine specifically refers to a routine called by another routine.