Métodos 3

.idea/misc.xml

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_X" default="true" project-jdk-name="openjdk-26" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_21" default="true" project-jdk-name="ms-21 (2)" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
 </project>

.idea/vcs.xml

@@ -2,5 +2,6 @@
 <project version="4">
   <component name="VcsDirectoryMappings">
     <mapping directory="$PROJECT_DIR$" vcs="Git" />
+    <mapping directory="$PROJECT_DIR$/src" vcs="Git" />
   </component>
 </project>

src/Metodos3.java

@@ -1,4 +1,23 @@
-package PACKAGE_NAME;
+import java.util.*;
 
 public class Metodos3 {
+    public static void main(String[] args) {
+        Scanner sc = new Scanner(System.in);
+        boolean detener = false;
+        int num = 0;
+        while(!detener){
+            System.out.println("Introduce un numero: ");
+            num = sc.nextInt();
+            if(num < 0) {
+                System.out.println("Tiene que ser un numero positivo");
+            } else detener = true;
+        }
+        System.out.printf("El factorial de %d es %.2f\n", num, factorial(num));
+        sc.close();
+    }
+    private static double factorial(int n) {
+        double result = 1.00;
+        while(n > 0) result *= (double)n--;
+        return result;
+    }
 }