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Other numerical datatypes in Java
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Other numerical datatypes in Java

Java Numerical-Datatypes 03-04 min 0-10 sec 06-10-23, 11:22 p.m. Pritesh12378i

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As explained in the previous chapter, a <a href="https://www.w3schools.com/java/java_variables.asp" style="box-sizing: inherit; color: inherit;">variable</a> in Java  be a specified data type:

<h3 style="box-sizing: inherit; font-size: 24px; font-family: &quot;Segoe UI&quot;, Arial, sans-serif; margin: 10px 0px;">Example<a class="ws-black ws-hover-black spaces-tryit ga-featured" href="https://www.w3schools.com/spaces/" style="box-sizing: inherit; position: relative; margin-right: 0px; overflow: visible; margin-bottom: 5px; float: right; border-radius: 5px; font-size: 17px; font-family: &quot;Source Sans Pro&quot;, sans-serif; padding: 6px 18px; background-color: rgb(40, 42, 53) !important; color: white !important;" target="_blank" title="W3Schools Spaces">Get your own Java Server</a></h3><pre class="w3-white language-java" style="box-sizing: inherit; font-family: Consolas, &quot;Source Code Pro&quot;, Menlo, Monaco, &quot;Andale Mono&quot;, &quot;Ubuntu Mono&quot;, monospace; font-size: 1em; color: black; text-wrap: nowrap; word-spacing: normal; word-break: normal; overflow-wrap: normal; line-height: 1.5; tab-size: 2; hyphens: none; padding: 1em; margin-top: 1em; margin-bottom: 1em; overflow: auto; border-left-width: 4px; border-left-color: rgb(4, 170, 109); background: rgb(255, 255, 255) !important;" tabindex="0"><code class="language-java" style="box-sizing: inherit; font-family: Consolas, &quot;Source Code Pro&quot;, Menlo, Monaco, &quot;Andale Mono&quot;, &quot;Ubuntu Mono&quot;, monospace; font-size: 1em; color: black; background-image: none; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; text-wrap: nowrap; word-spacing: normal; word-break: normal; overflow-wrap: normal; line-height: 1.5; tab-size: 2; hyphens: none;"><span class="token keyword keyword-int" style="box-sizing: inherit; color: rgb(0, 119, 170);">int</span> myNum <span class="token operator" style="box-sizing: inherit; color: rgb(154, 110, 58);">=</span> <span class="token number" style="box-sizing: inherit; color: rgb(153, 0, 85);">5</span><span class="token punctuation" style="box-sizing: inherit; color: rgb(153, 153, 153);">;</span> <span class="token comment" style="box-sizing: inherit; color: slategray;">// Integer (whole number)</span> <span class="token keyword keyword-float" style="box-sizing: inherit; color: rgb(0, 119, 170);">float</span> myFloatNum <span class="token operator" style="box-sizing: inherit; color: rgb(154, 110, 58);">=</span> <span class="token number" style="box-sizing: inherit; color: rgb(153, 0, 85);">5.99f</span><span class="token punctuation" style="box-sizing: inherit; color: rgb(153, 153, 153);">;</span> <span class="token comment" style="box-sizing: inherit; color: slategray;">// Floating point number</span> <span class="token keyword keyword-char" style="box-sizing: inherit; color: rgb(0, 119, 170);">char</span> myLetter <span class="token operator" style="box-sizing: inherit; color: rgb(154, 110, 58);">=</span> <span class="token char" style="box-sizing: inherit; color: rgb(102, 153, 0);">'D'</span><span class="token punctuation" style="box-sizing: inherit; color: rgb(153, 153, 153);">;</span> <span class="token comment" style="box-sizing: inherit; color: slategray;">// Character</span> <span class="token keyword keyword-boolean" style="box-sizing: inherit; color: rgb(0, 119, 170);">boolean</span> myBool <span class="token operator" style="box-sizing: inherit; color: rgb(154, 110, 58);">=</span> <span class="token boolean" style="box-sizing: inherit; color: rgb(153, 0, 85);">true</span><span class="token punctuation" style="box-sizing: inherit; color: rgb(153, 153, 153);">;</span> <span class="token comment" style="box-sizing: inherit; color: slategray;">// Boolean</span> <span class="token class-name" style="box-sizing: inherit; color: rgb(221, 74, 104);">String</span> myText <span class="token operator" style="box-sizing: inherit; color: rgb(154, 110, 58);">=</span> <span class="token string" style="box-sizing: inherit; color: rgb(102, 153, 0);">"Hello"</span><span class="token punctuation" style="box-sizing: inherit; color: rgb(153, 153, 153);">;</span> <span class="token comment" style="box-sizing: inherit; color: slategray;">// Strin</span> </code></pre>


Data types are divided into two groups:

<ul style="box-sizing: inherit;"><li style="box-sizing: inherit;">Primitive data types - includes <code class="w3-codespan" style="box-sizing: inherit; font-family: &quot;Source Code Pro&quot;, Menlo, Consolas, monospace; font-size: 15.75px; color: crimson; background-color: rgba(222, 222, 222, 0.3);">byte</code>, <code class="w3-codespan" style="box-sizing: inherit; font-family: &quot;Source Code Pro&quot;, Menlo, Consolas, monospace; font-size: 15.75px; color: crimson; background-color: rgba(222, 222, 222, 0.3);">short</code>, <code class="w3-codespan" style="box-sizing: inherit; font-family: &quot;Source Code Pro&quot;, Menlo, Consolas, monospace; font-size: 15.75px; color: crimson; background-color: rgba(222, 222, 222, 0.3);">int</code>, <code class="w3-codespan" style="box-sizing: inherit; font-family: &quot;Source Code Pro&quot;, Menlo, Consolas, monospace; font-size: 15.75px; color: crimson; background-color: rgba(222, 222, 222, 0.3);">long</code>, <code class="w3-codespan" style="box-sizing: inherit; font-family: &quot;Source Code Pro&quot;, Menlo, Consolas, monospace; font-size: 15.75px; color: crimson; background-color: rgba(222, 222, 222, 0.3);">float</code>, <code class="w3-codespan" style="box-sizing: inherit; font-family: &quot;Source Code Pro&quot;, Menlo, Consolas, monospace; font-size: 15.75px; color: crimson; background-color: rgba(222, 222, 222, 0.3);">double</code>, <code class="w3-codespan" style="box-sizing: inherit; font-family: &quot;Source Code Pro&quot;, Menlo, Consolas, monospace; font-size: 15.75px; color: crimson; background-color: rgba(222, 222, 222, 0.3);">boolean</code> and <code class="w3-codespan" style="box-sizing: inherit; font-family: &quot;Source Code Pro&quot;, Menlo, Consolas, monospace; font-size: 15.75px; color: crimson; background-color: rgba(222, 222, 222, 0.3);">char</code></li><li style="box-sizing: inherit;">Non-primitive data types - such as <code class="w3-codespan" style="box-sizing: inherit; font-family: &quot;Source Code Pro&quot;, Menlo, Consolas, monospace; font-size: 15.75px; color: crimson; background-color: rgba(222, 222, 222, 0.3);"><a href="https://www.w3schools.com/java/java_strings.asp" style="box-sizing: inherit; color: inherit;">String</a></code>, <a href="https://www.w3schools.com/java/java_arrays.asp" style="box-sizing: inherit; color: inherit;">Arrays</a> and <a href="https://www.w3schools.com/java/java_classes.asp" style="box-sizing: inherit; color: inherit;">Classes</a> (you will learn more about these in a later chapter)</li></ul><hr style="overflow: visible; border-top-color: rgb(238, 238, 238); margin: 20px -16px;"><h2 style="box-sizing: inherit; font-size: 25px; font-family: &quot;Segoe UI&quot;, Arial, sans-serif; margin: 10px 0px;">Primitive Data Types</h2>

A primitive data type specifies the size and type of variable values, and it has no additional methods.

There are eight primitive data types in Java:

<table class="ws-table-all notranslate" style="box-sizing: inherit; width: 351.5px; border: 1px solid rgb(204, 204, 204); margin: 20px 0px;"><tbody style="box-sizing: inherit;"><tr style="box-sizing: inherit; border-bottom: 1px solid rgb(221, 221, 221);"><th style="box-sizing: inherit; padding: 8px 8px 8px 16px; vertical-align: top; width: 99px;">Data Type</th><th style="box-sizing: inherit; padding: 8px; vertical-align: top; width: 52.5px;">Size</th><th style="box-sizing: inherit; padding: 8px; vertical-align: top; width: 199px;">Description</th></tr><tr style="box-sizing: inherit; border-bottom: 1px solid rgb(221, 221, 221); background-color: rgb(231, 233, 235);"><td style="box-sizing: inherit; padding: 8px 8px 8px 16px; vertical-align: top;"><code class="w3-codespan" style="box-sizing: inherit; font-family: &quot;Source Code Pro&quot;, Menlo, Consolas, monospace; font-size: 15.75px; color: crimson; background-color: rgba(222, 222, 222, 0.3);">byte</code></td><td style="box-sizing: inherit; padding: 8px; vertical-align: top;">1 byte</td><td style="box-sizing: inherit; padding: 8px; vertical-align: top;">Stores whole numbers from -128 to 127</td></tr><tr style="box-sizing: inherit; border-bottom: 1px solid rgb(221, 221, 221);"><td style="box-sizing: inherit; padding: 8px 8px 8px 16px; vertical-align: top;"><code class="w3-codespan" style="box-sizing: inherit; font-family: &quot;Source Code Pro&quot;, Menlo, Consolas, monospace; font-size: 15.75px; color: crimson; background-color: rgba(222, 222, 222, 0.3);">short</code></td><td style="box-sizing: inherit; padding: 8px; vertical-align: top;">2 bytes</td><td style="box-sizing: inherit; padding: 8px; vertical-align: top;">Stores whole numbers from -32,768 to 32,767</td></tr><tr style="box-sizing: inherit; border-bottom: 1px solid rgb(221, 221, 221); background-color: rgb(231, 233, 235);"><td style="box-sizing: inherit; padding: 8px 8px 8px 16px; vertical-align: top;"><code class="w3-codespan" style="box-sizing: inherit; font-family: &quot;Source Code Pro&quot;, Menlo, Consolas, monospace; font-size: 15.75px; color: crimson; background-color: rgba(222, 222, 222, 0.3);">int</code></td><td style="box-sizing: inherit; padding: 8px; vertical-align: top;">4 bytes</td><td style="box-sizing: inherit; padding: 8px; vertical-align: top;">Stores whole numbers from -2,147,483,648 to 2,147,483,647</td></tr><tr style="box-sizing: inherit; border-bottom: 1px solid rgb(221, 221, 221);"><td style="box-sizing: inherit; padding: 8px 8px 8px 16px; vertical-align: top;"><code class="w3-codespan" style="box-sizing: inherit; font-family: &quot;Source Code Pro&quot;, Menlo, Consolas, monospace; font-size: 15.75px; color: crimson; background-color: rgba(222, 222, 222, 0.3);">long</code></td><td style="box-sizing: inherit; padding: 8px; vertical-align: top;">8 bytes</td><td style="box-sizing: inherit; padding: 8px; vertical-align: top;">Stores whole numbers from -9,223,372,036,854,775,808 to 9,223,372,036,854,775,807</td></tr><tr style="box-sizing: inherit; border-bottom: 1px solid rgb(221, 221, 221); background-color: rgb(231, 233, 235);"><td style="box-sizing: inherit; padding: 8px 8px 8px 16px; vertical-align: top;"><code class="w3-codespan" style="box-sizing: inherit; font-family: &quot;Source Code Pro&quot;, Menlo, Consolas, monospace; font-size: 15.75px; color: crimson; background-color: rgba(222, 222, 222, 0.3);">float</code></td><td style="box-sizing: inherit; padding: 8px; vertical-align: top;">4 bytes</td><td style="box-sizing: inherit; padding: 8px; vertical-align: top;">Stores fractional numbers. Sufficient for storing 6 to 7 decimal digits</td></tr><tr style="box-sizing: inherit; border-bottom: 1px solid rgb(221, 221, 221);"><td style="box-sizing: inherit; padding: 8px 8px 8px 16px; vertical-align: top;"><code class="w3-codespan" style="box-sizing: inherit; font-family: &quot;Source Code Pro&quot;, Menlo, Consolas, monospace; font-size: 15.75px; color: crimson; background-color: rgba(222, 222, 222, 0.3);">double</code></td><td style="box-sizing: inherit; padding: 8px; vertical-align: top;">8 bytes</td><td style="box-sizing: inherit; padding: 8px; vertical-align: top;">Stores fractional numbers. Sufficient for storing 15 decimal digits</td></tr><tr style="box-sizing: inherit; border-bottom: 1px solid rgb(221, 221, 221); background-color: rgb(231, 233, 235);"><td style="box-sizing: inherit; padding: 8px 8px 8px 16px; vertical-align: top;"><code class="w3-codespan" style="box-sizing: inherit; font-family: &quot;Source Code Pro&quot;, Menlo, Consolas, monospace; font-size: 15.75px; color: crimson; background-color: rgba(222, 222, 222, 0.3);">boolean</code></td><td style="box-sizing: inherit; padding: 8px; vertical-align: top;">1 bit</td><td style="box-sizing: inherit; padding: 8px; vertical-align: top;">Stores true or false values</td></tr><tr style="box-sizing: inherit; border-bottom: 1px solid rgb(221, 221, 221);"><td style="box-sizing: inherit; padding: 8px 8px 8px 16px; vertical-align: top;"><code class="w3-codespan" style="box-sizing: inherit; font-family: &quot;Source Code Pro&quot;, Menlo, Consolas, monospace; font-size: 15.75px; color: crimson; background-color: rgba(222, 222, 222, 0.3);">char</code></td><td style="box-sizing: inherit; padding: 8px; vertical-align: top;">2 bytes</td><td style="box-sizing: inherit; padding: 8px; vertical-align: top;">Stores a single character/letter or ASCII values</td></tr></tbody></table>
06-10-23, 11:27 p.m. Pritesh12378i

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