diff --git a/1-hello-world/.gitignore b/1-hello-world/.gitignore
deleted file mode 100644
index e61812f..0000000
--- a/1-hello-world/.gitignore
+++ /dev/null
@@ -1 +0,0 @@
-notes/
diff --git a/1-hello-world/debug/target/.rustc_info.json b/1-hello-world/debug/target/.rustc_info.json
deleted file mode 100644
index 21867d4..0000000
--- a/1-hello-world/debug/target/.rustc_info.json
+++ /dev/null
@@ -1 +0,0 @@
-{"rustc_fingerprint":14802351894921902018,"outputs":{"7971740275564407648":{"success":true,"status":"","code":0,"stdout":"___\nlib___.rlib\nlib___.so\nlib___.so\nlib___.a\nlib___.so\n/home/nak/.rustup/toolchains/stable-x86_64-unknown-linux-gnu\noff\npacked\nunpacked\n___\ndebug_assertions\npanic=\"unwind\"\nproc_macro\ntarget_abi=\"\"\ntarget_arch=\"x86_64\"\ntarget_endian=\"little\"\ntarget_env=\"gnu\"\ntarget_family=\"unix\"\ntarget_feature=\"fxsr\"\ntarget_feature=\"sse\"\ntarget_feature=\"sse2\"\ntarget_has_atomic=\"16\"\ntarget_has_atomic=\"32\"\ntarget_has_atomic=\"64\"\ntarget_has_atomic=\"8\"\ntarget_has_atomic=\"ptr\"\ntarget_has_atomic_primitive_alignment=\"16\"\ntarget_has_atomic_primitive_alignment=\"32\"\ntarget_has_atomic_primitive_alignment=\"64\"\ntarget_has_atomic_primitive_alignment=\"8\"\ntarget_has_atomic_primitive_alignment=\"ptr\"\ntarget_os=\"linux\"\ntarget_pointer_width=\"64\"\ntarget_vendor=\"unknown\"\nunix\n","stderr":""},"1847801304416329599":{"success":true,"status":"","code":0,"stdout":"rustc 1.98.1 (48a229cea 2026-09-01)\nbinary: rustc\ncommit-hash: 48a229ceaefd4985c50990b14116b6d856af0985\ncommit-date: 2026-09-01\nhost: x86_64-unknown-linux-gnu\nrelease: 1.98.1\nLLVM version: 22.1.8\n","stderr":""}},"successes":{}}
\ No newline at end of file
diff --git a/1-hello-world/debug/target/CACHEDIR.TAG b/1-hello-world/debug/target/CACHEDIR.TAG
deleted file mode 100644
index 20d7c31..0000000
--- a/1-hello-world/debug/target/CACHEDIR.TAG
+++ /dev/null
@@ -1,3 +0,0 @@
-Signature: 8a477f597d28d172789f06886806bc55
-# This file is a cache directory tag created by cargo.
-# For information about cache directory tags see https://bford.info/cachedir/
diff --git a/1-hello-world/debug/target/debug/.cargo-artifact-lock b/1-hello-world/debug/target/debug/.cargo-artifact-lock
deleted file mode 100644
index e69de29..0000000
diff --git a/1-hello-world/debug/target/debug/.cargo-build-lock b/1-hello-world/debug/target/debug/.cargo-build-lock
deleted file mode 100644
index e69de29..0000000
diff --git a/1-hello-world/debug/target/debug/.cargo-lock b/1-hello-world/debug/target/debug/.cargo-lock
deleted file mode 100644
index e69de29..0000000
diff --git a/1-hello-world/debug/target/debug/.fingerprint/debug-5a1b483393417d95/bin-debug b/1-hello-world/debug/target/debug/.fingerprint/debug-5a1b483393417d95/bin-debug
deleted file mode 100644
index 54db1dd..0000000
--- a/1-hello-world/debug/target/debug/.fingerprint/debug-5a1b483393417d95/bin-debug
+++ /dev/null
@@ -1 +0,0 @@
-dc3015345aa383a3
\ No newline at end of file
diff --git a/1-hello-world/debug/target/debug/.fingerprint/debug-5a1b483393417d95/bin-debug.json b/1-hello-world/debug/target/debug/.fingerprint/debug-5a1b483393417d95/bin-debug.json
deleted file mode 100644
index 5608bee..0000000
--- a/1-hello-world/debug/target/debug/.fingerprint/debug-5a1b483393417d95/bin-debug.json
+++ /dev/null
@@ -1 +0,0 @@
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\ No newline at end of file
diff --git a/1-hello-world/debug/target/debug/.fingerprint/debug-5a1b483393417d95/dep-bin-debug b/1-hello-world/debug/target/debug/.fingerprint/debug-5a1b483393417d95/dep-bin-debug
deleted file mode 100644
index 5c54f74..0000000
Binary files a/1-hello-world/debug/target/debug/.fingerprint/debug-5a1b483393417d95/dep-bin-debug and /dev/null differ
diff --git a/1-hello-world/debug/target/debug/.fingerprint/debug-5a1b483393417d95/invoked.timestamp b/1-hello-world/debug/target/debug/.fingerprint/debug-5a1b483393417d95/invoked.timestamp
deleted file mode 100644
index e00328d..0000000
--- a/1-hello-world/debug/target/debug/.fingerprint/debug-5a1b483393417d95/invoked.timestamp
+++ /dev/null
@@ -1 +0,0 @@
-This file has an mtime of when this was started.
\ No newline at end of file
diff --git a/1-hello-world/debug/target/debug/.fingerprint/debug-5a1b483393417d95/output-bin-debug b/1-hello-world/debug/target/debug/.fingerprint/debug-5a1b483393417d95/output-bin-debug
deleted file mode 100644
index bc4c51e..0000000
--- a/1-hello-world/debug/target/debug/.fingerprint/debug-5a1b483393417d95/output-bin-debug
+++ /dev/null
@@ -1,6 +0,0 @@
-{"$message_type":"diagnostic","message":"struct `UnPrintable` is never constructed","code":{"code":"dead_code","explanation":null},"level":"warning","spans":[{"file_name":"src/main.rs","byte_start":95,"byte_end":106,"line_start":3,"line_end":3,"column_start":8,"column_end":19,"is_primary":true,"text":[{"text":"struct UnPrintable(i32);","highlight_start":8,"highlight_end":19}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[{"message":"`#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default","code":null,"level":"note","spans":[],"children":[],"rendered":null}],"rendered":"\u001b[1m\u001b[33mwarning\u001b[0m\u001b[1m: struct `UnPrintable` is never constructed\u001b[0m\n \u001b[1m\u001b[94m--> \u001b[0msrc/main.rs:3:8\n  \u001b[1m\u001b[94m|\u001b[0m\n\u001b[1m\u001b[94m3\u001b[0m \u001b[1m\u001b[94m|\u001b[0m struct UnPrintable(i32);\n  \u001b[1m\u001b[94m|\u001b[0m        \u001b[1m\u001b[33m^^^^^^^^^^^\u001b[0m\n  \u001b[1m\u001b[94m|\u001b[0m\n  \u001b[1m\u001b[94m= \u001b[0m\u001b[1mnote\u001b[0m: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default\n\n"}
-{"$message_type":"diagnostic","message":"struct `DebugPrintable` is never constructed","code":{"code":"dead_code","explanation":null},"level":"warning","spans":[{"file_name":"src/main.rs","byte_start":268,"byte_end":282,"line_start":8,"line_end":8,"column_start":8,"column_end":22,"is_primary":true,"text":[{"text":"struct DebugPrintable(i32);","highlight_start":8,"highlight_end":22}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[],"rendered":"\u001b[1m\u001b[33mwarning\u001b[0m\u001b[1m: struct `DebugPrintable` is never constructed\u001b[0m\n \u001b[1m\u001b[94m--> \u001b[0msrc/main.rs:8:8\n  \u001b[1m\u001b[94m|\u001b[0m\n\u001b[1m\u001b[94m8\u001b[0m \u001b[1m\u001b[94m|\u001b[0m struct DebugPrintable(i32);\n  \u001b[1m\u001b[94m|\u001b[0m        \u001b[1m\u001b[33m^^^^^^^^^^^^^^\u001b[0m\n\n"}
-{"$message_type":"diagnostic","message":"field `0` is never read","code":{"code":"dead_code","explanation":null},"level":"warning","spans":[{"file_name":"src/main.rs","byte_start":434,"byte_end":443,"line_start":13,"line_end":13,"column_start":8,"column_end":17,"is_primary":false,"text":[{"text":"struct Structure(i32);","highlight_start":8,"highlight_end":17}],"label":"field in this struct","suggested_replacement":null,"suggestion_applicability":null,"expansion":null},{"file_name":"src/main.rs","byte_start":444,"byte_end":447,"line_start":13,"line_end":13,"column_start":18,"column_end":21,"is_primary":true,"text":[{"text":"struct Structure(i32);","highlight_start":18,"highlight_end":21}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[{"message":"consider removing this field","code":null,"level":"help","spans":[],"children":[],"rendered":null},{"message":"`Structure` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis","code":null,"level":"note","spans":[],"children":[],"rendered":null}],"rendered":"\u001b[1m\u001b[33mwarning\u001b[0m\u001b[1m: field `0` is never read\u001b[0m\n  \u001b[1m\u001b[94m--> \u001b[0msrc/main.rs:13:18\n   \u001b[1m\u001b[94m|\u001b[0m\n\u001b[1m\u001b[94m13\u001b[0m \u001b[1m\u001b[94m|\u001b[0m struct Structure(i32);\n   \u001b[1m\u001b[94m|\u001b[0m        \u001b[1m\u001b[94m---------\u001b[0m \u001b[1m\u001b[33m^^^\u001b[0m\n   \u001b[1m\u001b[94m|\u001b[0m        \u001b[1m\u001b[94m|\u001b[0m\n   \u001b[1m\u001b[94m|\u001b[0m        \u001b[1m\u001b[94mfield in this struct\u001b[0m\n   \u001b[1m\u001b[94m|\u001b[0m\n   \u001b[1m\u001b[94m= \u001b[0m\u001b[1mhelp\u001b[0m: consider removing this field\n   \u001b[1m\u001b[94m= \u001b[0m\u001b[1mnote\u001b[0m: `Structure` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis\n\n"}
-{"$message_type":"diagnostic","message":"field `0` is never read","code":{"code":"dead_code","explanation":null},"level":"warning","spans":[{"file_name":"src/main.rs","byte_start":555,"byte_end":559,"line_start":18,"line_end":18,"column_start":8,"column_end":12,"is_primary":false,"text":[{"text":"struct Deep(Structure);","highlight_start":8,"highlight_end":12}],"label":"field in this struct","suggested_replacement":null,"suggestion_applicability":null,"expansion":null},{"file_name":"src/main.rs","byte_start":560,"byte_end":569,"line_start":18,"line_end":18,"column_start":13,"column_end":22,"is_primary":true,"text":[{"text":"struct Deep(Structure);","highlight_start":13,"highlight_end":22}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[{"message":"consider removing this field","code":null,"level":"help","spans":[],"children":[],"rendered":null},{"message":"`Deep` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis","code":null,"level":"note","spans":[],"children":[],"rendered":null}],"rendered":"\u001b[1m\u001b[33mwarning\u001b[0m\u001b[1m: field `0` is never read\u001b[0m\n  \u001b[1m\u001b[94m--> \u001b[0msrc/main.rs:18:13\n   \u001b[1m\u001b[94m|\u001b[0m\n\u001b[1m\u001b[94m18\u001b[0m \u001b[1m\u001b[94m|\u001b[0m struct Deep(Structure);\n   \u001b[1m\u001b[94m|\u001b[0m        \u001b[1m\u001b[94m----\u001b[0m \u001b[1m\u001b[33m^^^^^^^^^\u001b[0m\n   \u001b[1m\u001b[94m|\u001b[0m        \u001b[1m\u001b[94m|\u001b[0m\n   \u001b[1m\u001b[94m|\u001b[0m        \u001b[1m\u001b[94mfield in this struct\u001b[0m\n   \u001b[1m\u001b[94m|\u001b[0m\n   \u001b[1m\u001b[94m= \u001b[0m\u001b[1mhelp\u001b[0m: consider removing this field\n   \u001b[1m\u001b[94m= \u001b[0m\u001b[1mnote\u001b[0m: `Deep` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis\n\n"}
-{"$message_type":"diagnostic","message":"fields `name` and `age` are never read","code":{"code":"dead_code","explanation":null},"level":"warning","spans":[{"file_name":"src/main.rs","byte_start":597,"byte_end":603,"line_start":21,"line_end":21,"column_start":8,"column_end":14,"is_primary":false,"text":[{"text":"struct Person<'a> {","highlight_start":8,"highlight_end":14}],"label":"fields in this struct","suggested_replacement":null,"suggestion_applicability":null,"expansion":null},{"file_name":"src/main.rs","byte_start":614,"byte_end":618,"line_start":22,"line_end":22,"column_start":5,"column_end":9,"is_primary":true,"text":[{"text":"    name: &'a str,","highlight_start":5,"highlight_end":9}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":null},{"file_name":"src/main.rs","byte_start":633,"byte_end":636,"line_start":23,"line_end":23,"column_start":5,"column_end":8,"is_primary":true,"text":[{"text":"    age: u8","highlight_start":5,"highlight_end":8}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[{"message":"`Person` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis","code":null,"level":"note","spans":[],"children":[],"rendered":null}],"rendered":"\u001b[1m\u001b[33mwarning\u001b[0m\u001b[1m: fields `name` and `age` are never read\u001b[0m\n  \u001b[1m\u001b[94m--> \u001b[0msrc/main.rs:22:5\n   \u001b[1m\u001b[94m|\u001b[0m\n\u001b[1m\u001b[94m21\u001b[0m \u001b[1m\u001b[94m|\u001b[0m struct Person<'a> {\n   \u001b[1m\u001b[94m|\u001b[0m        \u001b[1m\u001b[94m------\u001b[0m \u001b[1m\u001b[94mfields in this struct\u001b[0m\n\u001b[1m\u001b[94m22\u001b[0m \u001b[1m\u001b[94m|\u001b[0m     name: &'a str,\n   \u001b[1m\u001b[94m|\u001b[0m     \u001b[1m\u001b[33m^^^^\u001b[0m\n\u001b[1m\u001b[94m23\u001b[0m \u001b[1m\u001b[94m|\u001b[0m     age: u8\n   \u001b[1m\u001b[94m|\u001b[0m     \u001b[1m\u001b[33m^^^\u001b[0m\n   \u001b[1m\u001b[94m|\u001b[0m\n   \u001b[1m\u001b[94m= \u001b[0m\u001b[1mnote\u001b[0m: `Person` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis\n\n"}
-{"$message_type":"diagnostic","message":"5 warnings emitted","code":null,"level":"warning","spans":[],"children":[],"rendered":"\u001b[1m\u001b[33mwarning\u001b[0m\u001b[1m: 5 warnings emitted\u001b[0m\n\n"}
diff --git a/1-hello-world/debug/target/debug/debug b/1-hello-world/debug/target/debug/debug
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diff --git a/1-hello-world/debug/target/debug/debug.d b/1-hello-world/debug/target/debug/debug.d
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index 0033e22..0000000
--- a/1-hello-world/debug/target/debug/debug.d
+++ /dev/null
@@ -1 +0,0 @@
-/home/nak/Code/rust/learn-rust/debug/target/debug/debug: /home/nak/Code/rust/learn-rust/debug/src/main.rs
diff --git a/1-hello-world/debug/target/debug/deps/debug-5a1b483393417d95 b/1-hello-world/debug/target/debug/deps/debug-5a1b483393417d95
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-/home/nak/Code/rust/learn-rust/debug/target/debug/deps/debug-5a1b483393417d95: src/main.rs
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rename to 1-hello-world/formatted-printing/debug/main
diff --git a/1-hello-world/debug/src/main.rs b/1-hello-world/formatted-printing/debug/src/main.rs
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rename to 1-hello-world/formatted-printing/debug/src/main.rs
diff --git a/1-hello-world/formatted-printing/display/Cargo.toml b/1-hello-world/formatted-printing/display/Cargo.toml
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index 0000000..2c94f48
--- /dev/null
+++ b/1-hello-world/formatted-printing/display/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "deisplay"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]
diff --git a/1-hello-world/formatted-printing/display/src/main.rs b/1-hello-world/formatted-printing/display/src/main.rs
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index 0000000..e7a11a9
--- /dev/null
+++ b/1-hello-world/formatted-printing/display/src/main.rs
@@ -0,0 +1,3 @@
+fn main() {
+    println!("Hello, world!");
+}
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