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Mutual recursion

In mathematics and computer science, mutual recursion is a form of recursion where two or more mathematical or computational objects, such as functions or datatypes, are defined in terms of each other. Mutual recursion is very common in functional programming and in some problem domains, such as recursive descent parsers, where the datatypes are…

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Prevalence

Terminology

Conversion to direct recursion

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Mutual recursion

Nodes45
Edges44
Triples45
Avg. degree1.96
Density0.044444
Components1

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Mutual recursion

Top relations

related to Prevalence · 11
Mutual recursion → Abelson, For, In, LISP, ML, Mutual, Peter Norvig, Prolog, Scheme, Some, Sussman
related to Computer functions · 7
Mutual recursion → As, Common, In, Just, Note, Pascal, This
related to Conversion to direct recursion · 6
Mutual recursion → AB, ABABAB, If, In, Mathematically, Simple
related to Terminology · 5
Mutual recursion → For, If, Mutual, Similarly, This
related to Datatypes · 4
Mutual recursion → Further, Symbolically, The, This
is a · 2
Mutual recursion → form of recursion where two or more mathematical or computational objects, tree
related to External links · 2
Mutual recursion → Mutual, Rosetta Code

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Important terminology

recursion mutual recursive functions mutually one function tree example single call two calls direct trees code forest datatypes inlining defined

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
Mutual recursionis aform of recursion where two or more mathematical or computational objects0.90text
Mutual recursionis atree0.90text
Pascal that require declaration before useinstance ofIn languages0.80text
mutually recursive functions require forward declarationinstance ofIn languages0.80text
as a forward reference cannot be avoided when defining them.As with directly recursive functionsinstance ofIn languages0.80text
a wrapper function may be usefulinstance ofIn languages0.80text
with the mutually recursive functions defined as nested functions within its scope if this is supportedinstance ofIn languages0.80text
Prologinstance ofIn languages0.80text
mutual recursion is almost unavoidable.Some programming styles discourage mutual recursioninstance ofIn languages0.80text
claiming that it can be confusing to distinguish the conditions which will return an answer from the conditions that would allow the code to run forever without producing an answerinstance ofIn languages0.80text
Mutual recursionrelated to Computer functionsJust0.60section
Mutual recursionrelated to Computer functionsCommon0.60section

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