Loop execution flow in Javascript - Mini Project: Build & Apply

Loop Execution Flow

📖 Scenario: You are helping a small shop owner keep track of daily sales. Each day, the shop records the number of items sold. You want to calculate the total items sold over a week.

🎯 Goal: Build a program that uses a for loop to add up daily sales and show the total items sold in the week.

📋 What You'll Learn

Create an array with daily sales numbers for 7 days

Create a variable to hold the total sales starting at 0

Use a for loop to add each day's sales to the total

Print the total sales after the loop finishes

💡 Why This Matters

🌍 Real World

Shops and businesses often need to add up daily sales or counts to understand their performance over time.

💼 Career

Knowing how to use loops to process lists of data is a key skill for many programming jobs, especially in data processing and automation.

1

Create the daily sales data

Create an array called dailySales with these exact numbers: 5, 8, 6, 7, 4, 9, 3 representing sales for each day of the week.

Javascript

// Create the dailySales array with the given numbers
// Your code here

Need a hint?

Use square brackets [] to create an array and separate numbers with commas.

2

Set up the total sales counter

Create a variable called totalSales and set it to 0 to start counting total items sold.

Javascript

const dailySales = [5, 8, 6, 7, 4, 9, 3];
// Create totalSales variable and set it to 0
// Your code here

Need a hint?

Use let to create a variable that can change later.

3

Add daily sales using a for loop

Use a for loop with a variable i starting at 0 and running while i < dailySales.length. Inside the loop, add dailySales[i] to totalSales.

Javascript

const dailySales = [5, 8, 6, 7, 4, 9, 3];
let totalSales = 0;
// Write a for loop to add each daily sale to totalSales
// Your code here

Need a hint?

Remember to use i++ to increase the counter each time.

4

Display the total sales

Write console.log(totalSales) to print the total items sold after the loop.

Javascript

const dailySales = [5, 8, 6, 7, 4, 9, 3];
let totalSales = 0;
for (let i = 0; i < dailySales.length; i++) {
    totalSales += dailySales[i];
}
// Print the totalSales value
// Your code here

Need a hint?

The total should be the sum of all numbers in the array.