One-dimensional arrays in Java - Mini Project: Build & Apply

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Working with One-Dimensional Arrays in Java

📖 Scenario: You are helping a small store owner keep track of daily sales for a week. The owner wants to store the sales amounts in an array and then calculate the total sales.

🎯 Goal: Build a Java program that creates an array of daily sales, sets a target sales threshold, calculates the total sales using a loop, and then prints the total sales.

📋 What You'll Learn

Create a one-dimensional array called dailySales with exactly 7 elements representing sales amounts for each day.

Create an integer variable called salesTarget and set it to 500.

Use a for loop with the variable i to sum all elements in dailySales into a variable called totalSales.

Print the value of totalSales.

💡 Why This Matters

🌍 Real World

Stores and businesses often track daily sales or data points in arrays to analyze performance over time.

💼 Career

Understanding arrays and loops is fundamental for software development jobs that involve data processing and reporting.

1

Create the daily sales array

Create a one-dimensional integer array called dailySales with these exact values: 120, 85, 90, 100, 95, 110, 130.

Java

# Create the dailySales array with the given values
// Your code here

💡 Need a hint?

Use curly braces {} to list the values inside the array.

2

Set the sales target

Create an integer variable called salesTarget and set it to 500.

Java

int[] dailySales = {120, 85, 90, 100, 95, 110, 130};
// Create the salesTarget variable and set it to 500
// Your code here

💡 Need a hint?

Use int salesTarget = 500; to create the variable.

3

Calculate total sales using a for loop

Create an integer variable called totalSales and set it to 0. Then use a for loop with the variable i to add each element of dailySales to totalSales.

Java

int[] dailySales = {120, 85, 90, 100, 95, 110, 130};
int salesTarget = 500;
// Calculate totalSales by summing dailySales using a for loop
// Your code here

💡 Need a hint?

Use dailySales.length to get the number of elements in the array.

4

Print the total sales

Write a System.out.println statement to print the value of totalSales.

Java

int[] dailySales = {120, 85, 90, 100, 95, 110, 130};
int salesTarget = 500;
int totalSales = 0;
for (int i = 0; i < dailySales.length; i++) {
    totalSales += dailySales[i];
}
// Print the totalSales value
// Your code here

💡 Need a hint?

Use System.out.println(totalSales); to display the total sales.