diff --git a/Somme2.java b/Somme2.java
index 2da2342..853bbdd 100644
--- a/Somme2.java
+++ b/Somme2.java
@@ -9,7 +9,20 @@ public class Somme2 {
   }
 
   public static final int somme2(int n, int p) {
-    return 0;
-  }
+
+if (n<=p){
+  int r=0;
+
+  for (int q=n; q<=p; q++){
+  r=r+q;
+}
+return r;
+
+}
+
+else {
+  return somme2(p,n);
+}
+}
 
 }