improve function with other functions and comments

Rust/functions.rs

@@ -1,17 +1,33 @@
+// Main function
 fn main() {
     println!("Hello, Satoshi!");
 
     println!("-----Wallet-----");
 
     another_function(99999);
 
-    print_labeled_measurement(21000, 's')
+    print_labeled_measurement(21000, 's');
+
+    let x = {
+        let y = 6;
+        y + 1
+    };
+    println!("Value of x is: {x}.");
+    let x = five();
+    println!("Value of x is now: {x}.")
 }
 
+// Simple function that print provided Bitcoin Price
 fn another_function(x: i32) {
     println!("The Bitcoin price is {x}");
 }
 
+// Function that prints value and unit
 fn print_labeled_measurement(value: i32, unit_label: char) {
     println!("Bitcoin Balance : {value}{unit_label}");
 }
+
+// Function that returns 5
+fn five() -> i32 {
+    5
+}