diff --git a/.idea/misc.xml b/.idea/misc.xml
index d15472f..3d0947f 100644
--- a/.idea/misc.xml
+++ b/.idea/misc.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_18" default="true" project-jdk-name="openjdk-18" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_18" default="true" project-jdk-name="openjdk-21" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
 </project>
\ No newline at end of file
diff --git a/src/MyMath.java b/src/MyMath.java
index 7da9a29..1c5550c 100644
--- a/src/MyMath.java
+++ b/src/MyMath.java
@@ -2,6 +2,27 @@
 
 public class MyMath {
 
+    public static void gcf(){
+        //2 inputs from user
+        System.out.println("enter dividend");
+        Scanner input = new Scanner(System.in);
+        int a = input.nextInt();
+        System.out.println("enter divisor");
+        int b = input.nextInt();
+
+
+        //gcf algorithm
+       while(b!=0){
+           int c = b;
+           b = a % b;
+           a = c;
+           }
+
+        System.out.println("the gcf is " + a);
+    }
+
     public static void main(String[] args) {
+        gcf();
     }
+
 }