diff --git a/src/ProduktSumme.c b/src/ProduktSumme.c
new file mode 100644
index 0000000..3b8be64
--- /dev/null
+++ b/src/ProduktSumme.c
@@ -0,0 +1,47 @@
+//
+// Created by Justin Trausch on 06.02.2024.
+#include <stdio.h>
+
+// Int produkt
+// double Produkt
+// Bitshift bei Multiplikation mit 2er Potenzen
+//
+//6713 * 2^1
+//
+//
+//6713 << 1
+//6713 * 16 = 2^4
+//6713 << 4
+//2^n
+//x << n
+
+
+// Funktion zur Berechnung des Produktsymbols
+int berechneProdukt(int start, int ende) {
+    int produkt = 1;
+    for (int i = start; i <= ende; i++) {
+    produkt *= i;
+    }
+    for (int j = start; j <= ende; j++) {
+        for (int k = start; k <= ende; k++) {
+            for (int g = k; g <= ende; g++){
+                produkt *= j + k -g;
+            }
+        }
+    }
+    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
diff --git a/src/ProduktSumme.h b/src/ProduktSumme.h
new file mode 100644
index 0000000..f2607b2
--- /dev/null
+++ b/src/ProduktSumme.h
@@ -0,0 +1,13 @@
+//
+// Created by Justin Trausch on 06.02.2024.
+//
+
+#ifndef LINKES_TWIX_PRODUKTSUMME_H
+#define LINKES_TWIX_PRODUKTSUMME_H
+
+int berechneProdukt(int start, int ende);
+
+int berechneSumme(int start, int ende);
+
+
+#endif //LINKES_TWIX_PRODUKTSUMME_H
diff --git a/test/test_ProduktSumme.c b/test/test_ProduktSumme.c
new file mode 100644
index 0000000..02fbf05
--- /dev/null
+++ b/test/test_ProduktSumme.c
@@ -0,0 +1,44 @@
+#ifdef TEST
+
+#include "unity.h"
+
+#include "ProduktSumme.h"
+
+
+void setUp(void)
+{
+}
+
+void tearDown(void)
+{
+}
+
+void test_produkt_1(void)
+{
+    int result, expected = 1;
+
+    result = berechneProdukt(1,1);
+
+    TEST_ASSERT_EQUAL_INT(expected, result);
+}
+
+void test_Summe_1(void)
+{
+    int result, expected = 55;
+
+    result = berechneSumme(1,10);
+
+    TEST_ASSERT_EQUAL_INT(expected, result);
+}
+
+void test_Summe_2(void)
+{
+    int result, expected = 0;
+
+    result = berechneSumme(5,2);
+
+    TEST_ASSERT_EQUAL_INT(expected, result);
+}
+
+
+#endif //TEST