Hello and Variables

Explanation

1. Purpose

This program demonstrates how to store different types of data (text, integers, and decimals) in variables and display them to the console combined with text.

2. Key Concepts

• Data Types:
  • String for text.
  • int for whole numbers.
  • double for decimal numbers.
• String Concatenation (+ operator): Joining literal text and variables together into a single message.
• Console Output: Using System.out.println() to print text to the screen, ending with a new line.

3. Code Walkthrough

• Lines 3–5 (Variables): Creates and initializes three variables: course (stores text), lesson (stores an integer), and progress (stores a decimal).
• Line 6: Prints a basic greeting literal: "Hello, Codinx Labs!".
• Line 7: Combines the course text, a separator (" - lesson "), and the lesson number, printing them together.
• Line 8: Combines the label "Progress: " with the numeric progress value.

4. Output

Hello, Codinx Labs!
Java fundamentals - lesson 1
Progress: 0.25