Update README.md

Added an example.

README.md

@@ -15,6 +15,17 @@ C3 tries to be an alternative in the the C/C++ niche: fast and close to the meta
 - Avoid "big ideas" & the "more is better" fallacy.
 - Introduce some higher level conveniences where the value is great.
 
+### Example code
+
+```c++
+module hello_world;
+import std::io;
+
+func void main()
+{
+   io::printf("Hello, world!\n");
+}
+```
 
 ### In what ways do C3 differ from C?
 
@@ -114,4 +125,4 @@ the r/ProgrammingLanguages Discord: https://discord.gg/cfu4wdk
 - If you wish to contribute with ideas, please file issues on the c3docs: https://github.com/c3lang/c3docs instead of the compiler.
 - Discuss the language on discord to help iron out syntax.
 - Stdlib work will soon start, do you want to help out building the C3 std lib?
-- Do you want do do real compiler work? Everyone is welcome to contribute.
+- Do you want do do real compiler work? Everyone is welcome to contribute.