diff --git a/1.HelloWorld/hello.rs b/1.HelloWorld/1-Comments.rs
similarity index 100%
rename from 1.HelloWorld/hello.rs
rename to 1.HelloWorld/1-Comments.rs
diff --git a/1.HelloWorld/formattedPrint.rs b/1.HelloWorld/2-0-FormattedPrint.rs
similarity index 100%
rename from 1.HelloWorld/formattedPrint.rs
rename to 1.HelloWorld/2-0-FormattedPrint.rs
diff --git a/1.HelloWorld/debugging.rs b/1.HelloWorld/2-1-Debugging.rs
similarity index 100%
rename from 1.HelloWorld/debugging.rs
rename to 1.HelloWorld/2-1-Debugging.rs
diff --git a/1.HelloWorld/display.rs b/1.HelloWorld/2-2-0-Display.rs
similarity index 100%
rename from 1.HelloWorld/display.rs
rename to 1.HelloWorld/2-2-0-Display.rs
diff --git a/1.HelloWorld/testcase.rs b/1.HelloWorld/2-2-1-Testcase-List.rs
similarity index 100%
rename from 1.HelloWorld/testcase.rs
rename to 1.HelloWorld/2-2-1-Testcase-List.rs
diff --git a/1.HelloWorld/formatting.rs b/1.HelloWorld/2-3-Formatting.rs
similarity index 100%
rename from 1.HelloWorld/formatting.rs
rename to 1.HelloWorld/2-3-Formatting.rs