Java Output Numbers

In this lesson, we will explore how to use the println() method to print numbers in Java, as well as how to perform basic arithmetic operations within the println() method.

Printing Numbers with println()

You can use the println() method to print numbers in Java. Unlike text, numbers do not need to be enclosed in double quotes.

Example:

System.out.println(7);
System.out.println(123);
System.out.println(45678);

System.out.println(7);

System.out.println(123);

System.out.println(45678);

Performing Mathematical Calculations

You can also perform basic arithmetic operations directly inside the println() method. This allows you to print the result of the calculation.

Example:

System.out.println(5 + 5);

System.out.println(5 + 5);

Example:

System.out.println(4 * 6);

System.out.println(4 * 6);

In the examples above, the println() method evaluates the expressions 5 + 5 and 4 * 6 and prints their results, which are 10 and 24 respectively.

Additional Information

• Combining Text and Numbers: You can combine text and numbers in the println() method using the + operator. Example:

  int apples = 5;
  System.out.println("I have " + apples + " apples.");

  int apples = 5;

  System.out.println("I have " + apples + " apples.");

• Escape Characters: To include special characters such as newlines (\n) or tabs (\t) in your text, you can use escape sequences. Example:

  System.out.println("First Line\nSecond Line");

  System.out.println("First Line\nSecond Line");

This will print:

  First Line
  Second Line

  First Line

  Second Line

• The print() Method: Similar to println(), the print() method does not add a new line at the end of the output. Use it when you want to continue printing on the same line. Example:

  System.out.print("Numbers: ");
  System.out.print(10);
  System.out.print(", ");
  System.out.print(20);

  System.out.print("Numbers: ");

  System.out.print(10);

  System.out.print(", ");

  System.out.print(20);

This will print:

  Numbers: 10, 20

  Numbers: 10, 20