Update file week01.md

docs/assignments/week01.md

@@ -54,6 +54,14 @@ For Example:
 This is not *fun*!
 *This is not fun!*
 
+**Asterisk/Underscore for Bold and Italic**
+
+Add *** or ___ before a word or a phrase to bold and italicize text.
+
+For Example:
+
+***This is Fun!***
+