diff --git a/src/ProduktSumme.c b/src/ProduktSumme.c
index 0899097..3b8be64 100644
--- a/src/ProduktSumme.c
+++ b/src/ProduktSumme.c
@@ -30,4 +30,18 @@ int berechneProdukt(int start, int ende) {
         }
     }
     return produkt;
+}
+
+int berechneSumme(int start, int ende) {
+
+    if (start > ende) {
+        return 0;
+    }
+
+    int summe = 0;
+    for (int i = start; i <= ende; i++) {
+        summe += i;
+    }
+
+    return summe;
 }
\ No newline at end of file