Updated readme

README.md

@@ -7,8 +7,36 @@ It has been been built on top of LLVM.
 
 ## Show me the code!
 
-### Data
+### Comments
+Like in C, comments can specified using either `\\` which will run until the end of the line or through `/* */` block. However, unlike C, the `/* bla bla /* bla */ */` comments can be also embeded inside each other.
+
+### Literals
+**Number literals** can be specified as decimal, hexadecimal, and binary numbers. Digits can be separated by an '_' but it cannot be the first or the last character (otherwise it will get interpreted as and identifier).
+
+```
+// Valid examples:
+1024
+1_024
+1.245
+
+1_000.
+
+0xffa
+0xffaa_42bb
+
+0b1101
+0b1010_0101
+
+// Invalid examples:
+_100
+1000_.100
+
+0x_fa
+
+0b10_
+_0b1101
+```
 
 ### Control flow
 
-### Functions
+### Functions