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Topic: Recursion in Java
Recursion is a powerful programming technique in which a method calls itself to solve a problem. In Java, recursion can be used to solve a wide range of problems, from calculating factorials to traversing data structures.
Here's an example to illustrate the concept of recursion in Java:
In this example, the
countDown method takes an integer n as input. If n is equal to 0, it prints "Done!" and returns. Otherwise, it prints the value of n, and then calls itself with n - 1 as the argument.When we run the
countDown method with the argument 5, it will print the numbers from 5 to 1, and then print "Done!".Exercise
Now it's your turn to practice recursion in Java. Write a recursive method to calculate the factorial of a given number.
Remember that the factorial of a number
n is the product of all positive integers less than or equal to n. For example, the factorial of 5 is 5 * 4 * 3 * 2 * 1 = 120.Resources
- 作者:现代数学启蒙
- 链接:https://www.math1234567.com/article/csa001
- 声明:本文采用 CC BY-NC-SA 4.0 许可协议，转载请注明出处。
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