fix spelling error (#11)

diff --git a/book/src/02_basic_calculator/06_while.md b/book/src/02_basic_calculator/06_while.md
index 8b80827..5c2d1b4 100644 (file)
--- a/book/src/02_basic_calculator/06_while.md
+++ b/book/src/02_basic_calculator/06_while.md
@@ -30,7 +30,7 @@ while i <= 5 {
 }
 ```
 
-This will keep adding 1 to `sum` until `i` is no longer less than or equal to 5.
+This will keep adding 1 to `i` and `i` to `sum` until `i` is no longer less than or equal to 5.
 
 ## The `mut` keyword
 
@@ -86,4 +86,4 @@ This will compile and run without errors.
 
 ## Further reading
 
-- [`while` loop documentation](https://doc.rust-lang.org/std/keyword.while.html)
\ No newline at end of file
+- [`while` loop documentation](https://doc.rust-lang.org/std/keyword.while.html)