diff --git a/add.py b/add.py
index 79aff70..c46e8da 100644
--- a/add.py
+++ b/add.py
@@ -2,4 +2,4 @@
 b=4
 d=7
 c=a+b=d
-print c
+print c and d
diff --git a/addition.c b/addition.c
new file mode 100644
index 0000000..d33c6e7
--- /dev/null
+++ b/addition.c
@@ -0,0 +1,3 @@
+a=10;
+b=5;
+c=15;
\ No newline at end of file
diff --git a/sub.c b/sub.c
new file mode 100644
index 0000000..2989b91
--- /dev/null
+++ b/sub.c
@@ -0,0 +1,4 @@
+a=10;
+b=5;
+c=10-5;
+this is subtraction