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Java Java Basics Getting Started with Java Strings, Variables, and Formatting

Posted by Matthew Johnson
Matthew Johnson
626 Points

How do you replace <YOUR NAME> in the console.printf expression with the firstName variable using the string format?

console.printf("%s, can you code in Java", firstName);

1 Answer

Eredis Gutierrez
Eredis Gutierrez
6,531 Points
Eredis Gutierrez
Eredis Gutierrez
6,531 Points

Hey Matthew!

Basically the printf method scans for any percentage sign with a converter for example.

  • %s = String
  • %d = Integer (Decimal Integer)
  • %f = float
  • etc...

When you define the %s the Java Interpreter scans for you to define a String in the second parameter of the printf method, So let's say we are welcoming a new student to Treehouse, This is what you would do.

String student = "John";
System.out.printf("Welcome, %s to Treehouse!", student);

This will then print out.

Welcome, John to Treehouse!
Matthew Johnson
Matthew Johnson
626 Points

Thanks Eredis!