Added ex 15,16 for loops

15_for.zig

@@ -0,0 +1,24 @@
+//
+// Behold the 'for' loop! It lets you execute code for each
+// member of an array (and things called 'slices' which we'll
+// get to in a bit).
+//
+//     for (items) |item| {
+//         // Do something with item
+//     }
+//
+const std = @import("std");
+
+pub fn main() void {
+    const story = [_]u8{ 'h', 'h', 's', 'n', 'h' };
+
+    std.debug.print("A Dramatic Story: ", .{});
+
+    for (???) |???| {
+        if(scene == 'h') std.debug.print(":-)  ", .{});
+        if(scene == 's') std.debug.print(":-(  ", .{});
+        if(scene == 'n') std.debug.print(":-|  ", .{});
+    }
+
+    std.debug.print("The End.\n", .{});
+}