diff --git a/Code/16.Macro.jl b/Code/16.Macro.jl
index 1cf5fb3..7ee313b 100644
--- a/Code/16.Macro.jl
+++ b/Code/16.Macro.jl
@@ -21,5 +21,8 @@ reallyslowfunction() = sleep(2)
     sleep(1)
 end
 
-
+# The @inbounds macro removes all checks to see if you try to acces elements
+# outside any container, so might be faster, but definately more unsafe.
+a = [1, 2, 3]
+@inbounds println(a[2])
 
diff --git a/Code/3.arithmetic.jl b/Code/3.arithmetic.jl
index f2af15a..debfa37 100644
--- a/Code/3.arithmetic.jl
+++ b/Code/3.arithmetic.jl
@@ -26,8 +26,8 @@ function main()
     
     # Integer division is done by div, fld or cld (floor divide/ceil divide)
     # div rounds towards zero (1.5 -> 1, -2.7 -> -2)
-    # floor rounds downwards (1.5 -> 1, -2.7 -> -3)
-    # ceil rounds upwards (1.5 -> 2, -2.7 -> -2)
+    # floor rounds downwards  (1.5 -> 1, -2.7 -> -3)
+    # ceil rounds upwards     (1.5 -> 2, -2.7 -> -2)
     c = div(a, b)
     c = fld(a, b)
     c = cld(a, b)
diff --git a/Code/4.strings.jl b/Code/4.strings.jl
index a6e5b72..e5aa626 100644
--- a/Code/4.strings.jl
+++ b/Code/4.strings.jl
@@ -56,7 +56,7 @@ println(s)
 println("a + b = ", a + b)
 
 
-# The raw string macro is very useful when copying raw text and not
+# The "raw" string macro is very useful when copying raw text and not
 # wanting to worry about special characters doing special stuff
 # (i.e. \n for new line). A common use for this is filepaths