diff --git a/Exercises/day-1/function-exersice-1.js b/Exercises/day-1/function-exersice-1.js
new file mode 100644
index 0000000..55676ae
--- /dev/null
+++ b/Exercises/day-1/function-exersice-1.js
@@ -0,0 +1,30 @@
+// Exercises: Level 1
+
+// Declare a function fullName and it takes firstName, lastName as a parameter and it returns your full - name.
+const fullname = (firstname, lastname) => {
+    return `${firstname} ${lastname}`
+}
+// Declare a function addNumbers and it takes two two parameters and it returns sum.
+const sum = (a, b) =>{
+    return a + b
+}
+
+// Area of a circle is calculated as follows: area = π x r x r. Write a function which calculates _areaOfCircle
+const areaOfCircle = (r,pi=3.14) => {
+    return pi * r * r
+}
+
+// Temperature in oC can be converted to oF using this formula: oF = (oC x 9/5) + 32. Write a function which convert oC to oF convertCelciusToFahrenheit.
+const temperature = (oC) => {
+    return (oC * 9/5) + 32
+}
+
+// Body mass index(BMI) is calculated as follows: bmi = weight in Kg / (height x height) in m2. Write a function which calculates bmi. BMI is used to broadly define different weight groups in adults 20 years old or older.Check if a person is underweight, normal, overweight or obese based the information given below.
+
+    // The same groups apply to both men and women.
+    // Underweight: BMI is less than 18.5
+    // Normal weight: BMI is 18.5 to 24.9
+    // Overweight: BMI is 25 to 29.9
+    // Obese: BMI is 30 or more
+
+// Write a function called checkSeason, it takes a month parameter and returns the season:Autumn, Winter, Spring or Summer.
\ No newline at end of file
diff --git a/Exercises/day-1/object-exercise-3.js b/Exercises/day-1/object-exercise-3.js
index f080f07..ce68683 100644
--- a/Exercises/day-1/object-exercise-3.js
+++ b/Exercises/day-1/object-exercise-3.js
@@ -2,29 +2,29 @@
 
 // Create an object literal called personAccount. It has firstName, lastName, incomes, expenses properties and it has totalIncome, totalExpense, accountInfo,addIncome, addExpense and accountBalance methods. Incomes is a set of incomes and its description and expenses is a set of incomes and its description.
 const personAccount = {
-    firstName: 'fitsum',
-    lastName: 'helina',
-    incomes: [
-      { description: 'Salary', amount: 50000 },
-      { description: 'Bonus', amount: 10000 },
-    ],
-    expenses: [
-      { description: 'Rent', amount: 10000 },
-      { description: 'Groceries', amount: 5000 },
-    ],
-    totalIncome() {
-      return this.incomes.reduce((total, income) => total + income.amount, 0);
-    },
-    totalExpense() {
-      return this.expenses.reduce((total, expense) => total + expense.amount, 0);
-    },
-    accountInfo() {
-      return `Account Information: ${this.firstName} ${this.lastName}`;
-    },
-    addIncome(description, amount) {
-      this.incomes.push({ description, amount });
-    },
-}
+  firstName: "fitsum",
+  lastName: "helina",
+  incomes: [
+    { description: "Salary", amount: 50000 },
+    { description: "Bonus", amount: 10000 },
+  ],
+  expenses: [
+    { description: "Rent", amount: 10000 },
+    { description: "Groceries", amount: 5000 },
+  ],
+  totalIncome() {
+    return this.incomes.reduce((total, income) => total + income.amount, 0);
+  },
+  totalExpense() {
+    return this.expenses.reduce((total, expense) => total + expense.amount, 0);
+  },
+  accountInfo() {
+    return `Account Information: ${this.firstName} ${this.lastName}`;
+  },
+  addIncome(description, amount) {
+    this.incomes.push({ description, amount });
+  },
+};
 
 // **** Questions:2, 3 and 4 are based on the following two arrays:users and products ()
 
@@ -111,32 +111,30 @@ const newuser = {
   isLoggedIn: null,
 };
 
-    const signUp = (newuser) => {
-// //solution1
-        const userExists = users.find((user) => user._id === newuser._id);
-        if (userExists) {
-            console.log('User already exists!')
-            return;
-        }
-        else{
-            users.push(newuser)
-            console.log('User added successfully!')
-        }
+const signUp = (newuser) => {
+  // //solution1
+  const userExists = users.find((user) => user._id === newuser._id);
+  if (userExists) {
+    console.log("User already exists!");
+    return;
+  } else {
+    users.push(newuser);
+    console.log("User added successfully!");
+  }
 
-// solution 2
-        for (const user of users ){
-            if(user._id === newuser._id){
-                console.log('User already exists!')
-                return;
-            }
-            else{
-                users.push(newuser)
-                console.log('User added successfully!')
-                break;
-            }
-        }
+  // solution 2
+  for (const user of users) {
+    if (user._id === newuser._id) {
+      console.log("User already exists!");
+      return;
+    } else {
+      users.push(newuser);
+      console.log("User added successfully!");
+      break;
     }
-    signUp(newuser);
+  }
+};
+signUp(newuser);
 
 // b. Create a function called signIn which allows user to sign in to the application
 const signIn = (newuser) => {
@@ -196,36 +194,37 @@ const rateproduct = (productId, userid, rate) => {
   }
 };
 // b. Create a function called averageRating which calculate the average rating of a product
-const averageRating = (productid , products ) => {
-    const product = products.find ((item) => productid === item._id);
-    if (product) {
-        if (product.ratings.length === 0){
-            console.log(`No ratings yet for ${product.name}`)
-            return;
-        }
-        const sum = product.ratings.reduce((sum,rating) => sum + rating.rate ,0)
-        const average = sum / product.ratings.length
-        console.log(`average rating for ${product.name} is ${average} and it had ${product.ratings.length} rates `)
-    }
-    else {
-        console.log("product not found");
+const averageRating = (productid, products) => {
+  const product = products.find((item) => productid === item._id);
+  if (product) {
+    if (product.ratings.length === 0) {
+      console.log(`No ratings yet for ${product.name}`);
+      return;
     }
-}
+    const sum = product.ratings.reduce((sum, rating) => sum + rating.rate, 0);
+    const average = sum / product.ratings.length;
+    console.log(
+      `average rating for ${product.name} is ${average} and it had ${product.ratings.length} rates `
+    );
+  } else {
+    console.log("product not found");
+  }
+};
 
 // Create a function called likeProduct. This function will helps to like to the product if it is not liked and remove like if it was liked.
 
 const likeProduct = (productId, userId, products) => {
-    const product = products.find((item) => productId === item._id);
-    if (product) {
-        const exixst = product.likes.find((like) => userId === like);
-        if (exixst) {
-            product.likes = product.likes.filter((like) => like !== userId);
-            console.log(`${userId} has removed like from ${product.name}`);
-        } else {
-            product.likes.push(userId);
-            console.log(`${userId} has liked ${product.name}`);
-        }
+  const product = products.find((item) => productId === item._id);
+  if (product) {
+    const exixst = product.likes.find((like) => userId === like);
+    if (exixst) {
+      product.likes = product.likes.filter((like) => like !== userId);
+      console.log(`${userId} has removed like from ${product.name}`);
     } else {
-        console.log("product not found");
+      product.likes.push(userId);
+      console.log(`${userId} has liked ${product.name}`);
     }
-}
\ No newline at end of file
+  } else {
+    console.log("product not found");
+  }
+};