Learn Java for free with this interactive course, and get a handle on one of the most popular programming languages in the world.

You'll start with a simple hello world program and proceed to cover common concepts such as Conditional Statements, Loop Statements, Math, and Logic in Java, before moving on to more advanced concepts like Inheritance, Generics, and ArrayLists, along with much more.

By the time you're done, you'll be an intermediate level Java developer, ready to take on your own projects.

Learn Intermediate Java

## Problem statement
A *two-dimensional* array can also be thought of as a *matrix*.

Implement a Java method to **initialize & print** a two-dimensional array of size **n x n** in the form of a matrix. You should initialize and Print an array of size 3 x 3 as:
* The *diagonal* of the *array* should be filled with **0**. 
* The *lower side* should be filled will **-1s**. 
* *upper side* should be filled with **1s**.

>**Note:** In order to move a value to the next line you can use `\n`.

### Function prototype
```java
void printMat(int n)
```
### Sample input
```java
int n = 3;
```
### Sample output pictorial representation

# Problem statement
A *two-dimensional* array can also be thought of as a *matrix*.

Implement a Java method to **initialize & print** a two-dimensional array of size **n x n** in the form of a matrix. You should initialize and Print an array of size 3 x 3 as:
* The *diagonal* of the *array* should be filled with **0**. 
* The *lower side* should be filled will **-1s**. 
* *upper side* should be filled with **1s**.

>**Note:** In order to move a value to the next line you can use `\n`.

## Function prototype
```java
void printMat(int n)
```
## Sample input
```java
int n = 3;
```
## Sample output pictorial representation

In this challenge, you will figure out how to print a Matrix using a two-dimensional Array.

Getting Started with Java!

Variables & User Input

Simple Maths & Logic

Strings and String Processing

Conditional Statements

Loops

Methods

Arrays

Classes and Inheritance

Generics

ArrayLists

Java Exam

Challenge 3: Print a Matrix

Problem statement

Function prototype

Sample input

Sample output pictorial representation