recursive subroutine: meaning, definition, pronunciation and examples
C2Technical/Formal
Quick answer
What does “recursive subroutine” mean?
A subroutine (function or procedure) that calls itself directly or indirectly during its execution.
Audio
Pronunciation
Definition
Meaning and Definition
A subroutine (function or procedure) that calls itself directly or indirectly during its execution.
A programming construct that solves problems by breaking them down into smaller, self-similar subproblems, continuing until a base case is reached, then returning results back up the chain. Also used metaphorically to describe processes that repeat in self-referential patterns.
Dialectal Variation
British vs American Usage
Differences
No significant differences in meaning. UK English may occasionally use 'procedure' interchangeably with 'subroutine' in educational contexts, while US texts consistently use 'subroutine' or 'function'.
Connotations
Neutral technical term in both varieties. Slight preference for 'recursive function' in academic mathematics contexts globally.
Frequency
Equally rare in general discourse, but standard in programming literature in both regions.
Grammar
How to Use “recursive subroutine” in a Sentence
The recursive subroutine calculates [mathematical expression]We need to implement [algorithm] as a recursive subroutineThis recursive subroutine handles [data structure]Vocabulary
Collocations
Examples
Examples of “recursive subroutine” in a Sentence
verb
British English
- The programme recurses through the data structure.
- We'll need to recurse here to solve the subproblem.
American English
- The function recurses until it hits the base case.
- We should recurse on the left subtree first.
adverb
British English
- The function calls itself recursively.
- The problem was solved recursively.
American English
- The program processes the data recursively.
- We implemented it recursively for clarity.
adjective
British English
- The recursive approach proved more elegant.
- We implemented a recursive solution for the puzzle.
American English
- This recursive method uses less code.
- The algorithm follows a recursive pattern.
Usage
Meaning in Context
Business
Rare except in tech companies discussing algorithms or system architecture.
Academic
Common in computer science, mathematics, and computational linguistics papers.
Everyday
Virtually never used in casual conversation.
Technical
Standard term in programming documentation, software engineering, and algorithm design.
Vocabulary
Synonyms of “recursive subroutine”
Strong
Neutral
Weak
Vocabulary
Antonyms of “recursive subroutine”
Watch out
Common Mistakes When Using “recursive subroutine”
- Forgetting the base case leads to infinite recursion
- Confusing recursion with iteration
- Using recursion where iteration would be more memory-efficient
- Misspelling as 'recursive subroutine'
FAQ
Frequently Asked Questions
Recursion involves function calls to itself with modified parameters until reaching a base case, while iteration uses loops to repeat operations. Recursion typically uses more memory (call stack) but can be more elegant for certain problems.
They can be if not properly optimized. Modern compilers can optimize tail recursion to be as efficient as iteration, but deep recursion may cause stack overflow errors.
Functional languages like Haskell, Lisp, and Scheme are designed for recursion. Most imperative languages (Python, Java, C++) also support it, though they may have recursion depth limits.
Yes, theoretically any iterative algorithm can be converted to recursion and vice versa, though one approach may be more natural or efficient for specific problems.
A subroutine (function or procedure) that calls itself directly or indirectly during its execution.
Recursive subroutine is usually technical/formal in register.
Recursive subroutine: in British English it is pronounced /rɪˈkɜːsɪv ˌsʌbruːˈtiːn/, and in American English it is pronounced /rɪˈkɜːrsɪv ˈsʌbruːtiːn/. Tap the audio buttons above to hear it.
Phrases
Idioms & Phrases
- “Drill down recursively”
- “Fall into infinite recursion”
- “Unwind the recursion”
Learning
Memory Aids
Mnemonic
RECURSIVE = REpeatedly CURSIVE (running back); like a snake biting its own tail in programming.
Conceptual Metaphor
A set of Russian nesting dolls (matryoshka) - each doll contains a smaller version of itself.
Practice
Quiz
What is the main risk of an improperly designed recursive subroutine?