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🖨️ Java Print Variables – Displaying Data with Style

Now that you’ve learned how to store values using variables, let’s talk about how to display them on the screen. In Java, the System.out.println() method isn’t just for static text — it’s your tool for outputting dynamic data, too!

At GoNimbus, we help you understand how to print variables clearly and efficiently.

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📌 Displaying Text with Variables

To print the value of a variable, simply pass it inside the System.out.println() method:

String language = "Java";
System.out.println(language);

🖥️ Output:

Java

You can also combine variables and text using the + operator (called concatenation):

String name = "GoNimbus";
System.out.println("Welcome to " + name + " tutorials!");

🖥️ Output:

Welcome to GoNimbus tutorials!

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👥 Combine Multiple String Variables

String firstName = "John";
String lastName = "Doe";
String fullName = firstName + " " + lastName;

System.out.println("Full Name: " + fullName);

🖥️ Output:

Full Name: John Doe

✅ Notice the " " (space) between the two names — Java doesn’t automatically insert spaces, so you need to add them manually.

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➕ Print Numeric Variables and Perform Math

When using the + operator with numeric values, Java performs mathematical addition:

int a = 10;
int b = 15;
System.out.println("Sum: " + (a + b));

🖥️ Output:

Sum: 25

🧠 Wrap the operation in parentheses to ensure Java adds the numbers before combining with the string. Without parentheses, it will concatenate values as text!

System.out.println("Result: " + a + b);  // Output: Result: 1015 (wrong)
System.out.println("Result: " + (a + b)); // Output: Result: 25 (correct)

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🔄 Mixing Strings and Numbers

Java lets you mix strings and numbers in output, but be careful with how they’re combined:

int age = 30;
System.out.println("Age: " + age); // Works fine

But this can be misleading:

System.out.println("Total: " + 10 + 5); // Output: Total: 105

Use parentheses to ensure proper math:

System.out.println("Total: " + (10 + 5)); // Output: Total: 15

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💬 GoNimbus Tips

✅ Always use parentheses when mixing numbers with strings to avoid unexpected results
✅ Use spaces " " explicitly when joining words or values
✅ Use descriptive variable names like userName, totalScore, courseTitle for readability

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🔜 Coming Next: Java Data Types

You’ve learned how to store and display variables — now let’s understand the different types of data Java can handle and how to choose the right type for your needs.

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