diff --git a/README.md b/README.md
index 501da81..b2abb6e 100644
--- a/README.md
+++ b/README.md
@@ -9,4 +9,5 @@ https://tinchicus.com/2022/09/26/rust-listado-del-curso-inicial/
 - https://tinchicus.com/2022/06/10/rust-slice/ (slices)
 - https://tinchicus.com/2022/06/13/rust-pasando-valores/ (porvalor y porreferencia)
 - https://tinchicus.com/2022/06/14/rust-la-libreria-std/
-- https://tinchicus.com/2022/06/15/rust-println/ (println)
\ No newline at end of file
+- https://tinchicus.com/2022/06/15/rust-println/ (println)
+- https://tinchicus.com/2022/06/16/rust-format/ (format)
\ No newline at end of file
diff --git a/format/Cargo.toml b/format/Cargo.toml
new file mode 100644
index 0000000..9f82067
--- /dev/null
+++ b/format/Cargo.toml
@@ -0,0 +1,8 @@
+[package]
+name = "format"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
diff --git a/format/src/main.rs b/format/src/main.rs
new file mode 100644
index 0000000..e16a955
--- /dev/null
+++ b/format/src/main.rs
@@ -0,0 +1,23 @@
+fn main() {
+    println!("Hello, world!");
+    let mut visual = format!("{} {}", 23, 89);
+    println!("{}", visual);
+    visual = format!("{} {1} {} {0}", "Hola", "Mundo");
+    println!("{}", visual);
+    visual = format!("{t} {a} {b} {a}", a = "Hola", b = "Mundo", t = 23);
+    println!("{}", visual);
+    visual = format!("{:.4}", 3.1415927);
+    println!("{}", visual);
+
+    let v1 = format!("{:.3}", 3.1415927);
+    let v2 = format!("{:b}", 55);
+    let v3 = format!("{:+}!", 5);
+    let v4 = format!("{:x}", 95);
+    let v5 = format!("{:#x}", 95);
+
+    println!("{}", v1);
+    println!("{}", v2);
+    println!("{}", v3);
+    println!("{}", v4);
+    println!("{}", v5);
+}