Every variable in java must be supposed as the specified datatype.
And these data types are classified into two types.
<ul>
<li>Primitive Datatypes
</li>
<li>Non-Primitive Datatypes.
</li>
</ul>
<h3 id="heading-primitive-datatypes">Primitive DataTypes:</h3>
Primitive DataTypes tells us the size and type of variable values.
Primitive datatypes mainly include datatypes such as :
<ul>
<li><code>byte</code>
</li>
<li><code>short</code>
</li>
<li><code>int</code>
</li>
<li><code>long</code>
</li>
<li><code>float</code>
</li>
<li><code>double</code>
</li>
<li><code>boolean</code>
</li>
<li><code>char</code>
</li>
</ul>
<blockquote>
<code>1 Byte</code> is equal to <code>8 bits</code>
</blockquote>
<div class="hn-table">
<table>
<thead>
<tr>
<td>DataType</td><td>Size</td><td>Ranges From</td></tr>
</thead>
<tbody>
<tr>
<td><code>byte</code></td><td><code>1 byte</code></td><td>ranges from <code>-128 to 127.</code></td></tr>
<tr>
<td><code>short</code></td><td><code>2 bytes</code></td><td>ranges from <code>-32,768 to 32,767.</code></td></tr>
<tr>
<td><code>int</code></td><td><code>4 bytes</code></td><td>ranges from <code>2,147,483,648 to 2,147,483,647.</code></td></tr>
<tr>
<td><code>long</code></td><td><code>8 bytes</code></td><td>ranges from <code>-9,223,372,036,854,775,808 to 9,223,372,036,854,775,807.</code></td></tr>
<tr>
<td><code>float</code></td><td><code>4 bytes</code></td><td>stores the <code>fractional</code> numbers.</td></tr>
<tr>
<td><code>double</code></td><td><code>8 bytes</code></td><td>stores the <code>fractional</code> numbers.</td></tr>
<tr>
<td><code>boolean</code></td><td><code>1 bit</code></td><td>stores <code>true</code> or <code>false</code> values.</td></tr>
<tr>
<td><code>char</code></td><td><code>2 bytes</code></td><td>stores a <code>single character/ ASCII values.</code></td></tr>
</tbody>
</table>
</div><h3 id="heading-non-primitive-datatypes">Non-Primitive DataTypes:</h3>
<ul>
<li>Strings
</li>
<li>Arrays
</li>
<li>Classes
</li>
</ul>
Example:
<pre><code class="lang-java">int number = 5; // Integer (whole number)
float floatNumber = 5.99f; // Floating point number
char letter = 'D'; // Character
boolean choice = true; // Boolean
String text = "Hello"; // String
</code></pre>

Every **variable** in java must be supposed as the **specified datatype.**

And these data types are classified into two types.

*   Primitive Datatypes
    
*   Non-Primitive Datatypes.
    

### Primitive DataTypes:

Primitive DataTypes tells us the **size** and **type of variable values**.

Primitive datatypes mainly include datatypes such as :

*   `byte`
    
*   `short`
    
*   `int`
    
*   `long`
    
*   `float`
    
*   `double`
    
*   `boolean`
    
*   `char`
    

> `1 Byte` is equal to `8 bits`

| DataType | Size | Ranges From |
| --- | --- | --- |
| `byte` | `1 byte` | ranges from `-128 to 127.` |
| `short` | `2 bytes` | ranges from `-32,768 to 32,767.` |
| `int` | `4 bytes` | ranges from `2,147,483,648 to 2,147,483,647.` |
| `long` | `8 bytes` | ranges from `-9,223,372,036,854,775,808 to 9,223,372,036,854,775,807.` |
| `float` | `4 bytes` | stores the `fractional` numbers. |
| `double` | `8 bytes` | stores the `fractional` numbers. |
| `boolean` | `1 bit` | stores `true` or `false` values. |
| `char` | `2 bytes` | stores a `single character/ ASCII values.` |

### Non-Primitive DataTypes:

*   Strings
    
*   Arrays
    
*   Classes
    

Example:

```java
int number = 5;              // Integer (whole number)
float floatNumber = 5.99f;   // Floating point number
char letter = 'D';           // Character
boolean choice = true;       // Boolean
String text = "Hello";       // String

```

DataType	Size	Ranges From
`byte`	`1 byte`	ranges from `-128 to 127.`
`short`	`2 bytes`	ranges from `-32,768 to 32,767.`
`int`	`4 bytes`	ranges from `2,147,483,648 to 2,147,483,647.`
`long`	`8 bytes`	ranges from `-9,223,372,036,854,775,808 to 9,223,372,036,854,775,807.`
`float`	`4 bytes`	stores the `fractional` numbers.
`double`	`8 bytes`	stores the `fractional` numbers.
`boolean`	`1 bit`	stores `true` or `false` values.
`char`	`2 bytes`	stores a `single character/ ASCII values.`

Java Data types

Primitive DataTypes:

Non-Primitive DataTypes:

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