If you are a beginner, you will be surprised to see only the first or second paragraph in my posts. If you want to read the full post, you have to click on the Read more... link. I will share with you how to do it.
The function is called Post Summary. You can make a post summary function by adding a little code to your template code. But this code is for blogger layout template and does not work for classic template.
Remember my Blogger Recent Comments I posted a while ago that uses Javascript? Well, here is a widget that is even easier!