diff --git a/.idea/misc.xml b/.idea/misc.xml
index 639900d..6f29fee 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">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_21" default="true" project-jdk-name="21" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
 </project>
\ No newline at end of file
diff --git a/.idea/vcs.xml b/.idea/vcs.xml
new file mode 100644
index 0000000..35eb1dd
--- /dev/null
+++ b/.idea/vcs.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="" vcs="Git" />
+  </component>
+</project>
\ No newline at end of file
diff --git a/Java-Assignment-004.iml b/Java-Assignment-004.iml
index b46c0dd..e1006ff 100644
--- a/Java-Assignment-004.iml
+++ b/Java-Assignment-004.iml
@@ -5,6 +5,7 @@
     <content url="file://$MODULE_DIR$">
       <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
     </content>
+    <orderEntry type="inheritedJdk" />
     <orderEntry type="sourceFolder" forTests="false" />
   </component>
 </module>
\ No newline at end of file
diff --git a/src/Multadd.java b/src/Multadd.java
new file mode 100644
index 0000000..8572ef9
--- /dev/null
+++ b/src/Multadd.java
@@ -0,0 +1,22 @@
+public class Multadd {
+    public static double multadd(double a, double b, double c){
+        return a*b+c;
+}
+    public static double expsum(double x) {
+        double part3 = multadd(x, Math.exp(-x), Math.sqrt(1 - Math.exp(-x)));
+        return part3;
+    }
+    public static void main(String[] args){
+        System.out.println(multadd(1.0,2.0,3.0));
+
+        double part1 = multadd(Math.sin(Math.PI/4),1.0/2.0,Math.cos(Math.PI/4)/2);
+        double part2 = multadd(Math.log10(10),1, Math.log10(20));
+        double part3 = expsum(1);
+        System.out.println(part1);
+        System.out.println(part2);
+        System.out.println(part3);
+    }
+
+    }
+
+