diff --git a/src/food_reg.rs b/src/food_reg.rs
new file mode 100644
index 0000000..cae0f01
--- /dev/null
+++ b/src/food_reg.rs
@@ -0,0 +1,32 @@
+use std::time::{Duration, SystemTime};
+
+#[derive(Debug, Clone)]
+#[allow(dead_code)]
+pub enum categories1 {
+    rice,
+    beans,
+    drinks,
+    snacks,
+    swallow,
+}
+
+#[derive(Debug, Clone)]
+#[allow(dead_code)]
+pub struct FoodType {
+    pub name: String,
+    pub price: u32,
+    pub is_vegan: bool,
+    pub category: categories1,
+    pub expiration: SystemTime,
+}
+
+pub fn expiration(Food_list: Vec<FoodType>) -> Result<(), String> {
+    let current_time = SystemTime::now();
+
+    for food in Food_list {
+        if current_time > food.expiration {
+            return Err(String::from("Food has expired"));
+        }
+    }
+    Ok(())
+}
diff --git a/src/main.rs b/src/main.rs
index 4ed90b2..5266a4e 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -82,35 +82,12 @@ fn main() {
     // user_name("Chris".to_string());
     // user_name("Emma".to_string());
 
-    // sub(20, 10);
-
-    // user("Mark", 23, "mark@gmail.co".to_string(), true);
-
-    // conditionals();
-
-    school_conditionals();
-    loops();
-    while_loop();
-}
-
-fn user_name(name: String) {
-    println!("My user name is {}", name)
-}
-
-fn add(a: u32, b: u32) -> u32 {
-    let sum = a + b;
-
-    println!("The sum of {a} and {b} is {sum}");
-    return sum;
-}
-
-fn sub(a: u32, b: u32) -> u32 {
-    let sum = a - b;
-    add(a, b);
-
-    println!("The sum of {a} and {b} is {sum}");
-    return sum;
-}
+// fn shadowing() {
+//     let x = 5;
+//     let x = 5 + 4;
+//     let x = x * 3;
+//     println!("{}", x);
+// }
 
 fn user(name: &str, age: u32, email: String, is_active: bool) -> String {
     println!(
@@ -155,23 +132,43 @@ fn school_conditionals() {
 fn loops() {
     let mut count = 0;
 
-    let result = loop {
-        count += 1;
+    let foodcart2 = FoodType {
+        name: String::from("beans"),
+        price: 2000,
+        is_vegan: true,
+        category: categories1::beans,
+        expiration: SystemTime::now() + std::time::Duration::from_secs(60 * 60 * 24), // Expires in 1 day
+    };
 
-        if count == 10 {
-            break count * 2;
-        }
-        println!("Infinite loop {}", count);
+    let foodcart3 = FoodType {
+        name: String::from("snacks"),
+        price: 2000,
+        is_vegan: false,
+        category: categories1::snacks,
+        expiration: SystemTime::now() + std::time::Duration::from_secs(60 * 60 * 24), // Expires in 1 day
     };
 
-    println!("The result is {:?}", result);
-}
+    let foodcart4 = FoodType {
+        name: String::from("coke"),
+        price: 2000,
+        is_vegan: true,
+        category: categories1::drinks,
+        expiration: SystemTime::now() + std::time::Duration::from_secs(60 * 60 * 24), // Expires in 1 day
+    };
 
-fn while_loop() {
-    let mut count = 6;
+    let foodcart5 = FoodType {
+        name: String::from("amala"),
+        price: 2000,
+        is_vegan: false,
+        category: categories1::swallow,
+        expiration: SystemTime::now() + std::time::Duration::from_secs(60 * 60 * 24), // Expires in 1 day
+    };
 
-    while count != 0 {
-        println!("The count is {}", count);
-        count -= 1;
+    let foods_list: Vec<FoodType> = vec![foodcart1, foodcart2, foodcart3, foodcart4, foodcart5];
+    //let food_category: Vec<categories1> = foods_list.into_iter().map(|food| food.category).collect();
+    //println!("categories: {:?}", food_category);
+    match food_reg::expiration(foods_list) {
+        Ok(_) => println!("All food items are fresh!"),
+        Err(e) => println!("Error: {}", e),
     }
 }
diff --git a/src/mk_calculator.rs b/src/mk_calculator.rs
new file mode 100644
index 0000000..f3dc515
--- /dev/null
+++ b/src/mk_calculator.rs
@@ -0,0 +1,41 @@
+use std::io;
+
+pub fn run() {
+    println! ("Enter calculation (5 + 3):");
+
+    let mut input = String::new();
+    io::stdin()
+         .read_line(&mut input)
+         .expect("Fail to read input");
+    let parts: Vec<&str> = input.trim().split_whitespace().collect();
+
+    if parts.len() != 3 {
+        println!("Invalid fomat. Use: number operator number");
+        return;
+    }
+
+    let num1: f64 = parts[0].parse().expect("Invalid number");
+    let operator = parts[1];
+    let num2: f64 = parts[2].parse().expect("Invalid number");
+
+    let result = match operator {
+        "+" => num1 + num2,
+        "-" => num1 - num2,
+        "*" => num1 * num2,
+        "/" => {
+            if num2 == 0.0{
+                println!("Cannot divide by zero");
+                return;
+            }
+            num1 / num2
+        }
+        _=> {
+            println!("Invalide Operator");
+            return;
+          }  
+
+    };
+
+    println! ("Result: {}", result);
+
+}
\ No newline at end of file