Java – What does “n” mean? [duplicate]

I had created a 2-dimensional array in Java and I was looking for a way to print it out on the console so that I could confirm that the stuff I was making was correct. I found some code online that performed this task for me, but I had a question about what a particular bit of the code meant.

int n = 10;
int[][] Grid = new int[n][n];

//some code dealing with populating Grid

void PrintGrid() {
    for (int i = 0; i < n; i++) {
        for (int j = 0; j < n; j++) {
            System.out.print(Grid[i][j] + " ");
        }
        System.out.print("n");
    }
}

What does “n” do? I tried searching on Google, but since it’s such a small bit of code I couldn’t find much.

7 Answers

Its is a new line

Escape Sequences
Escape Sequence Description
t  Insert a tab in the text at this point.
b  Insert a backspace in the text at this point.
n  Insert a newline in the text at this point.
r  Insert a carriage return in the text at this point.
f  Insert a formfeed in the text at this point.
'  Insert a single quote character in the text at this point.
"  Insert a double quote character in the text at this point.
\  Insert a backslash character in the text at this point.

http://docs.oracle.com/javase/tutorial/java/data/characters.html

n 

This means insert a newline in the text at this point.

Just example

System.out.println("hellonworld");

Output:

hello
world

(as per http://java.sun.com/…ex/Pattern.html)

The backslash character (‘‘) serves to introduce escaped constructs, as defined in the table above, as well as to quote characters that otherwise would be interpreted as unescaped constructs. Thus the expression \ matches a single backslash and { matches a left brace.

Other examples of usage :

\ The backslash character<br>
t The tab character ('u0009')<br>
n The newline (line feed) character ('u000A')<br>
r The carriage-return character ('u000D')<br>
f The form-feed character ('u000C')<br>
a The alert (bell) character ('u0007')<br>
e The escape character ('u001B')<br>
cx The control character corresponding to x <br>

n

That means a new line is printed.

As a side note there is no need to write that extra line . There is an built in inbuilt function there.

 println()  //prints the content in new line

Learn more from docs

n is an escape character for strings that is replaced with the new line object. Writing n in a string that prints out will print out a new line instead of the n

Java Escape Characters

In the specific case of the code example from the original question, the

System.out.print("n");

is there to move to a new line between incrementing i.

So the first print statement prints all of the elements of Grid[0][j]. When the innermost for loop has completed, the “n” gets printed and then all of the elements of Grid[1][j] are printed on the next line, and this is repeated until you have a 10×10 grid of the elements of the 2-dimensional array, Grid.

n is add a new line.

Please note java has method System.out.println(“Write text here”);

Notice the difference:

Code:

System.out.println("Text 1");
System.out.println("Text 2");

Output:

Text 1
Text 2

Code:

System.out.print("Text 1");
System.out.print("Text 2");

Output:

Text 1Text 2

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