diff --git a/single_files/forfor.zig b/single_files/forfor.zig
new file mode 100644
index 0000000..8e41d54
--- /dev/null
+++ b/single_files/forfor.zig
@@ -0,0 +1,9 @@
+const print = @import("std").debug.print;
+
+pub fn main() void {
+  for ([_]i32 { 1, 3, 4, 5, 6 }) |i| {
+    for ([_]i32 { 10, 20, 30}) |j| {
+      print("{} * {} = {}\n", .{i, j, i * j});
+    }
+  }
+}
diff --git a/single_files/optionals.zig b/single_files/optionals.zig
new file mode 100644
index 0000000..7fa6456
--- /dev/null
+++ b/single_files/optionals.zig
@@ -0,0 +1,7 @@
+const print = @import("std").debug.print;
+
+pub fn main() void {
+  var a: ?i32 = null;
+  var b = a orelse 1;
+  print("{} {} \n", .{a, b});
+}