My mood was much better after visiting the basement. In this dark and grim world, I finally had at least one hope to hold onto - the hope that there was at least a chance that I could make it back to my own time. 
For a few days after getting into the basement and back out again, I engaged in some people watching whenever I was moving around the base. By the looks of it, no one had particularly noticed my absence, which meant that I should be able to continue helping Noname to restore his modules without drawing suspicion.

Jessica was heading toward me in the corridor. "Hi, Teo. You look so enthusiastic today!" 
"Thanks, you look pretty chipper yourself!" I returned. I suddenly noticed that 

 other than me was headed in the other direction. "Where's everyone going?" I asked. 
"Ritchie returned from an expedition and said he had something to show off. He called a meeting in the big kitchen at..." Jessica looked at her watch, "Now! Let's go!" I turned on my heels and tried to keep up. 


Ritchie was standing at the front of the kitchen, and most of the tables were full. People were still trickling in little by little, and everyone was waiting for him to begin. Finally: 
"Hello, everyone! Thank you all for coming on such short notice. I've just returned from the machine city, and an ally of ours shared some intel they've been working on obtaining for a while. It turns out there are many more types than just 

"More? Really?" Someone from the crowd called. Ritchie replied, "Yes, many more. There are so-called 

 and the other types we already know. Let's start simple and go over some of the built-in types, the first of which are the 

 types. Both of these types represent a real number, sometimes referred to as a 

 (this is where the name 'float' goes from). For example," at this, Ritchie uncapped a marker and began writing on the whiteboard behind him, "numbers like 2.5, 17.9456, and 0.7 are real numbers."

"Why would we need such complexity?" someone asked, mirroring my own thoughts. "I use 

 in all my programs and everything seems to work fine!"

Ritchie had clearly anticipated this question. "In our world, the primary currency is viruses. Every number of viruses is an integer number. You can have 2, 5, or 10 viruses, but not 2.5, right? That's why you think in terms of the 

 type. Before our time though, people had a currency - the dollar - to calculate their money. You could have 1.50 dollars, or 1.63 dollars, not just 1 or 2. In a similar manner, you can use a 

 variable to store a real number inside:"

He continued, "I know it seems complicated, but you can add, subtract, divide, and multiply 

 variables same as you do with integers."

Ritchie continued making the case for the new types. "Even better," he said, "you can add, subtract, divide, and multiply 

 variables together. The result is automatically converted to a 

This isn't any different than how you do things outside of coding. We can add integers and real numbers, subtract them, divide them, and multiply them without any hiccups. At the same time, you 

 multiply strings with any other type, or divide or subtract. You can 

only add strings (using "+") to numeric types 

 to the screen or concatenate it with a string, you use exactly the same mechanisms as you used with an 

Everyone in the room was nodding. Ritchie asked us to try creating a 

 variable and then output it to the screen.

 a double from the screen, use the method 

 in memory space (hence the name 'double'). This results in a different range of values that you can store in these two types: 

By default, every real number in C# program is treated as a

. To force C# to recognize a number as a float, you must add an "f" at the end of every float, as shown in the above table and the below example.

You can add, subtract, multiply, and divide

variables the same as you can with doubles and ints. The result will again be a 

After walking around to make sure we had grasped the new concepts, Ritchie returned to the front of the room. "From now on," he began, "we're going to use the 

 type, but provides much more precise results. 

I suggest that you all get comfortable using the 

 if you have a very good reason to do so."

"Let's wrap up the first part of our meeting," Ritche said. "Complete this next task and then take a half-hour lunch break. We'll get into more new types this afternoon!"

Clear explanation of built-in types in C#: float and double types. Step-by-step with examples and online practical tasks.