Recursion vs. Iteration

The difference between recursion and iteration is that recursion is the statement in the code that calls a function itself whereas iteration allows code to repeat itself.

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Recursion vs. Iteration

Recursion and Iteration are two important concepts in computer programming. Both recursion and iteration repeat the set of instructions. Recursion is the statement in the code that calls a function itself on the other hand iteration allow code to repeat itself. Until the condition is being false, the process of iteration keeps on repeating itself.  Recursion is a process that is applied to a set of codes; iteration is set of instructions itself.

Recursion is allowed in C++ where there is a need to call the function again and again. Recursion is also defined as circular definition. Set of local variables and parameters are created for writing a recursive program. Recursion do not improve the memory utilization because it work many times. If you want to terminate recursion you should use statement or set of code to stop the recursion.

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Iteration keeps on executing until the set of instructions becomes false. Iteration is a set of statements that include initialization, comparison, and execution of the statements inside the iteration statement and the updating of the control variable. There is no use of the stack in the iteration to store variables whereas there is stack in recursion. That is the reason recursion is slower in execution than iteration.

Comparison Chart

BasisRecursionIteration
MeaningRecursion is the statement in the code that calls a function itself

Iteration allows code to repeat itself.

 

Applied Recursion is applied to functions.Iteration is applied to loops
StackThe stack is used in recursionThe stack is not used in iteration.
ProcessRecursion is slowIteration is fast
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Recursion

Recursion is allowed in C++ where there is a need to call function again and again. Recursion is also defined as a circular definition. Set of local variables and parameters are created for writing a recursive program. Recursion does not improve the memory utilization because it works many times. If you want to terminate recursion, you should use statement or set of code to stop the recursion.

Iteration

Iteration keeps on executing until the set of instructions becomes false. Iteration is a set of statements that include initialization, comparison, and execution of the statements inside the iteration statement and the updating of the control variable. There is no use of the stack in the iteration to store variables whereas there is stack in recursion. That is the reason recursion is slower in execution than iteration.

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Key Differences

  1. Recursion is the statement in the code that call a function itself whereas Iteration allow code to repeat itself.
  2. Recursion is applied to functions whereas Iteration is applied to loops.
  3. The stack is used in recursion whereas stack is not used in the iteration.
  4. Recursion is slow whereas iteration is fast as compare to recursion.

Conclusion

In this article above we see the clear difference between recursion and iteration.

Explanatory Video

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