Thread: What is the difference?

public class BeerSong {
	public static void main (String[] args) {
		int beerNum = 99;
		String word = "bottles";
		while (beerNum > 0) {
 
			if (beerNum == 1) {
			word = "bottle";
			}
			System.out.print(beerNum + " " + word + " of beer on the wall, ");
			System.out.println(beerNum + " " + word + " of beer.");
			System.out.print("Take one down.");
			System.out.println(" Pass it around.\n");
			beerNum=beerNum - 1;
 
			if (beerNum == 0) {
				System.out.println("No more bottles of beer on the wall, no more bottles of beer.");
				System.out.println("Go to the store and but some more, 99 bottles of beer on the wall.");
			}
		}
	}
}

I am new to java. I am referring Head First Java. I am practicing all its codes. There is with the beer Song. I have corrected the error in it. But I have question: What is the difference between mentioning "String word" (in line 3 of code) and only "word" (in line 7).

When you code a data type like String before a variable name, you are defining the variable as that datatype.
Take a look at the tutorial:
Variables (The Java™ Tutorials > Learning the Java Language > Language Basics)