diff --git a/arrays/a.out b/OOP/a.out
similarity index 57%
rename from arrays/a.out
rename to OOP/a.out
index d000456..2ee7394 100755
Binary files a/arrays/a.out and b/OOP/a.out differ
diff --git a/OOP/class_methode_outside.cpp b/OOP/class_methode_outside.cpp
new file mode 100644
index 0000000..6635a53
--- /dev/null
+++ b/OOP/class_methode_outside.cpp
@@ -0,0 +1,23 @@
+#include <iostream>
+
+/*
+    Here we have a Class which has a Function that is declared outside of the Class itself ; 
+    We just reference the Function inside the class and later outside create a Function with this structure:
+        class::function()
+*/
+
+using namespace std;
+
+class outside {
+    public:
+        void coolFunc();
+};
+
+void outside::coolFunc() {
+    cout << "I am a cool Outside Function\n";
+};
+
+int main() {
+    outside classobj;
+    classobj.coolFunc(); // No cout needed here for some reason ; idk why
+}
\ No newline at end of file
diff --git a/OOP/class_methodes.cpp b/OOP/class_methodes.cpp
new file mode 100644
index 0000000..89ce4b1
--- /dev/null
+++ b/OOP/class_methodes.cpp
@@ -0,0 +1,19 @@
+#include <iostream>
+/*
+    Within a Class you can define Functions (called Methodes) ; you can define these to all datatypes you want but just be careful to not segfault
+*/
+
+using namespace std;
+
+class MethodConstruction {
+    public:
+        void myCoolFunction() {
+            cout << "I am a very Cool Function and I got called!\n";
+        }
+};
+
+int main() {
+    MethodConstruction classobj;
+    classobj.myCoolFunction();
+    return 0;
+}
\ No newline at end of file
diff --git a/OOP/simple.cpp b/OOP/simple.cpp
new file mode 100644
index 0000000..863d11a
--- /dev/null
+++ b/OOP/simple.cpp
@@ -0,0 +1,23 @@
+#include <iostream>
+
+using namespace std;
+
+
+/*  So basically a class is a template for data you can use anywhere ; so here you can def myVar to a int and a string to mystring and later output
+    that into a Object of that class (marked later in program)
+*/
+class MyClass {
+    public:
+        int myVar;
+        string myString;
+};
+
+int main() {
+
+    MyClass classobj1;
+    classobj1.myString = "You*re gay";
+    classobj1.myVar = 25565;
+
+    cout << classobj1.myString << "\n" << classobj1.myVar;
+
+}
\ No newline at end of file
diff --git a/a.out b/a.out
deleted file mode 100755
index 24d67af..0000000
Binary files a/a.out and /dev/null differ
diff --git a/arrays/py/sizeof_loop.py b/arrays/py/sizeof_loop.py
new file mode 100644
index 0000000..488b135
--- /dev/null
+++ b/arrays/py/sizeof_loop.py
@@ -0,0 +1,6 @@
+# dynamarray (c++topy)
+
+numbers = [1,1,2,2,34,45,5,6,7,2,3,34]
+
+for i in range(0, len(numbers)):
+    print(numbers[i])
\ No newline at end of file
diff --git a/arrays/sizeof_loop.cpp b/arrays/sizeof_loop.cpp
index 26664f8..f8ca453 100644
--- a/arrays/sizeof_loop.cpp
+++ b/arrays/sizeof_loop.cpp
@@ -1,3 +1,9 @@
+/*
+
+We use the sizeof Opperator here to determine the size of the Array "numbers" {in this case 10} ;
+After that we print "i" Element in "numbers"
+
+*/
 #include <iostream>
 
 using namespace std;
diff --git a/switch/a.out b/switch/a.out
new file mode 100755
index 0000000..a1ac209
Binary files /dev/null and b/switch/a.out differ
diff --git a/switch/switchcase.cpp b/switch/switchcase.cpp
new file mode 100644
index 0000000..5a7984b
--- /dev/null
+++ b/switch/switchcase.cpp
@@ -0,0 +1,37 @@
+#include <iostream>
+
+using namespace std;
+
+int main() {
+    int day;
+    cout << "Tag in Nummer: \n";
+    cin >> day;
+
+    switch (day)
+    {
+    case 1:
+        cout << "Montag";
+        break;
+    case 2:
+        cout << "Dienstag";
+        break;
+    case 3:
+        cout << "Mittwoch";
+        break;
+    case 4:
+        cout << "Donnerstag";
+        break;
+    case 5:
+        cout << "Freitag";
+        break;
+    case 6:
+        cout << "Samstag";
+        break;
+    case 7:
+        cout << "Sonntag";
+        break;
+    default:
+        cout << "Nummer von 1 bis 7!";
+        break;
+    }
+}
\ No newline at end of file