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Using Try/catch and recursion #1251

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Merged
StepfenShawn merged 1 commit into from
May 11, 2020
+11 −8
Merged

Using Try/catch and recursion #1251

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19 changes: 11 additions & 8 deletions Maths/Factorial.java
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Original file line number Diff line number Diff line change
Expand Up @@ -16,13 +16,16 @@ public static void main(String[] args) {
* @return the factorial of {@code n}
*/
public static long factorial(int n) {
if (n < 0) {
throw new ArithmeticException("n < 0"); //Dont work with less than 0
}
long fac = 1;
for (int i = 1; i <= n; ++i) {
fac *= i;
}
return fac; //Return factorial
// Using recursion
try {
if (n == 0) {
return 1; // if n = 0, return factorial of n;
}else {
return n*factorial(n-1); // While N is greater than 0, call the function again, passing n-1 (Principle of factoring);
}
}catch (ArithmeticException e) {
System.out.println("Dont work with less than 0");
}
return n;
}
}