function, statement, expression

5-functions/Cargo.toml

@@ -0,0 +1,8 @@
+[package]
+name = "functions"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]

5-functions/src/main.rs

@@ -0,0 +1,26 @@
+fn main() 
+    {
+        hello();
+
+        let x = {
+            let y = 5; //Statement
+            y+0 //Expression
+        };
+        println!("X = {}", x);
+
+
+        let y = return_value(x);
+        println!("Y = {}", y)
+    }
+
+fn hello()
+    {
+        println!("Hello World");
+    }
+
+fn return_value(mut x:i32) -> i32
+    {
+        println!("We're going to return something");
+        x = x+1;
+        x*x
+    }