diff --git a/rot13.c b/rot13.c
new file mode 100644
index 0000000..d76641f
--- /dev/null
+++ b/rot13.c
@@ -0,0 +1,10 @@
+#include <stdio.h>
+
+int main(void) {
+    char user_input;
+    printf("Bitte beliebigen buchstaben einfügen: ");
+    scanf("%c", &user_input);
+    char rot13 = (user_input - 97 + 13) % 26 + 97;
+    printf("Rot13(%c) = %c\n", user_input, rot13);
+    return 0;
+}