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A recursion procedure is one that calls itself. There are two kinds of recursion: direct and indirect. In direct recursion, the procedure calls itself and in indirect recursion, the first procedure calls a second procedure, which in turn, calls the first procedure. Recursion could be observed in numerous mathematical algorithms. For example consider the case of calculating the factorial of a number. Factorial of a number is given by the equation: Fact (n) = n * fact (n-1) for n > 0 For example: factorial of 5 is 1 x 2 x 3 x 4 x 5 = 5 x factorial of 4 and this can be a good example of showing a recursive procedure. Every recursive algorithm must have an ending condition i.e., the recursive calling of the program should be stopped when a condition is fulfilled. In the case of factorial algorithm the end condition is reached when n is 0.

A recursion procedure is one that calls itself. There are two kinds of recursion: direct and indirect. In direct recursion, the procedure calls itself and in indirect recursion, the first procedure calls a second procedure, which in turn, calls the first procedure. Recursion could be observed in numerous mathematical algorithms. For example consider the case of calculating the factorial of a number. Factorial of a number is given by the equation: Fact (n) = n * fact (n-1) for n > 0 For example: factorial of 5 is 1 x 2 x 3 x 4 x 5 = 5 x factorial of 4 and this can be a good example of showing a recursive procedure. Every recursive algorithm must have an ending condition i.e., the recursive calling of the program should be stopped when a condition is fulfilled. In the case of factorial algorithm the end condition is reached when n is 0.

Computer Networking: A Top-Down Approach (7th Edition)
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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A- recursion procedure is one that calls itself. There are two kinds of recursion: direct and indirect. In direct recursion, the procedure calls itself and in indirect recursion, the first procedure calls a second procedure, which in turn, calls the first procedure. Recursion could be observed in numerous mathematical algorithms. For example consider the case of calculating the factorial of a number. Factorial of a number is given by the equation: Fact (n) = n * fact (n-1) for n > 0 For example: factorial of 5 is 1 x 2 x 3 x 4 x 5 = 5 x factorial of 4 and this can be a good example of showing a recursive procedure. Every recursive algorithm must have an ending condition i.e., the recursive calling of the program should be stopped when a condition is fulfilled. In the case of factorial algorithm the end condition is reached when n is 0.
Transcribed Image Text:A- recursion procedure is one that calls itself. There are two kinds of recursion: direct and indirect. In direct recursion, the procedure calls itself and in indirect recursion, the first procedure calls a second procedure, which in turn, calls the first procedure. Recursion could be observed in numerous mathematical algorithms. For example consider the case of calculating the factorial of a number. Factorial of a number is given by the equation: Fact (n) = n * fact (n-1) for n > 0 For example: factorial of 5 is 1 x 2 x 3 x 4 x 5 = 5 x factorial of 4 and this can be a good example of showing a recursive procedure. Every recursive algorithm must have an ending condition i.e., the recursive calling of the program should be stopped when a condition is fulfilled. In the case of factorial algorithm the end condition is reached when n is 0.
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