diff --git a/iteration.Rmd b/iteration.Rmd
index 92609a2..a9eb8c1 100644
--- a/iteration.Rmd
+++ b/iteration.Rmd
@@ -375,7 +375,7 @@ I mention while loops briefly, because I hardly ever use them. They're most ofte
     }
     ```
 
-## For loops vs functionals
+## For loops vs. functionals
 
 For loops are not as important in R as they are in other languages because R is a functional programming language. This means that it's possible to wrap up for loops in a function, and call that function instead of using the for loop directly.