Update file week01.md

docs/assignments/week01.md

@@ -25,6 +25,14 @@ In the end I decided to use **Encode Sans Thin 100** because it's simple and mod
 
 **# for Headings**
 
+Add # in front of a word or a phrase to creating a heading. The numbers of # used correspond to the heading level.
+
+For Example:
+
+# 1 sign
+## 2 signs
+### 3 signs
+#### 4 signs