Is it possible to make recursive subroutine calls in Java?

Yes, you can make recursive method calls in Java.Just make sure you have a termination condition to avoid infinite recursion and stack overflows.The following is an example of recursion in Java.It implements a recursive factorial function.Note that in “real life” you wouldn’t want toimplement the factorial function recursively.It is more efficient to implement it iteratively.

public final class Recursion {  // Keep in mind you would never want to implement a recursive factorial  // routine because it is grossly inefficient as compared to an iterative  // computation.  public static final int integerFactorial(int num) {    if(num <= 1) {      if(num < 0)	throw new IllegalArgumentException("Factorial undefined for values less than 0");      return 1;    }    return num * integerFactorial(num - 1);  }  public static final void main(String args[]) {    int num;    if(args.length != 1) {      System.err.println("usage: Recursion ");      return;    }    try {      num = Integer.parseInt(args[0]);    } catch(NumberFormatException e) {      e.printStackTrace();      return;    }    System.out.println(integerFactorial(num));  }}
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