In the Latest update of Whatsapp, we can even text our friend in many ways like Bold,Italic,Strike through and also with Special Font From Whatsapp. Many other features are coming with new update like video calling,GIF support , User Mention During Chat .This Update will be roll out soon. Here is the Method to write all formatting style by adding some symbols in Chat.
For All Formatting Style :
Strikethrough= ~Write Text Between~
If you Also Want to Get the Update of the new whatsapp then go ahead and read How to Get Updates of Apps before Publishing for Everyone