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Java/Processing/processing-3.3.6/modes/java/reference/float.html
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Java/Processing/processing-3.3.6/modes/java/reference/float.html
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
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<title>float \ Language (API) \ Processing 2+</title>
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<!-- ==================================== CONTENT - Headers ============================ -->
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<div class="content">
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<p class="ref-notice">This reference is for Processing 3.0+. If you have a previous version, use the reference included with your software in the Help menu. If you see any errors or have suggestions, <a href="https://github.com/processing/processing-docs/issues?state=open">please let us know</a>. If you prefer a more technical reference, visit the <a href="http://processing.github.io/processing-javadocs/core/">Processing Core Javadoc</a> and <a href="http://processing.github.io/processing-javadocs/libraries/">Libraries Javadoc</a>.</p>
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<table cellpadding="0" cellspacing="0" border="0" class="ref-item">
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<tr class="name-row">
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<th scope="row">Name</th>
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<td><h3>float</h3></td>
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</tr>
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<tr class="">
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<tr class=""><th scope="row">Examples</th><td><div class="example"><pre >
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float a; // Declare variable 'a' of type float
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a = 1.5387; // Assign 'a' the value 1.5387
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float b = -2.984; // Declare variable 'b' and assign it the value -2.984
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float c = a + b; // Declare variable 'c' and assign it the sum of 'a' and 'b'
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</pre></div>
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<hr class="noshade" noshade="noshade" size="1">
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<div class="example"><pre >
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float f1 = 0.0;
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for (int i = 0 ; i < 100000; i++) {
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f1 = f1 + 0.0001; // Bad idea! See below.
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}
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println(f1);
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float f2 = 0.0;
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for (int i = 0; i < 100000; i++) {
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// The variable 'f2' will work better here, less affected by rounding
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f2 = i / 1000.0; // Count by thousandths
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}
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println(f2);
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</pre></div>
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</td></tr>
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<tr class="">
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<th scope="row">Description</th>
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<td>
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Data type for floating-point numbers, e.g. numbers that have a decimal point.<br />
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<br />
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Floats are not precise, so adding small values (such as 0.0001) may not always increment precisely due to rounding errors. If you want to increment a value in small intervals, use an <b>int</b>, and divide by a <b>float</b> value before using it. (See the second example above.)<br />
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<br />
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Floating-point numbers can be as large as 3.40282347E+38 and as low as -3.40282347E+38. They are stored as 32 bits (4 bytes) of information. The <b>float</b> data type is inherited from Java; you can read more about the technical details <a href="http://download.oracle.com/javase/tutorial/java/nutsandbolts/datatypes.html">here</a> and <a href="http://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.2.3">here</a>.<br />
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<br />
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Processing supports the <b>double</b> datatype from Java as well. However, none of the Processing functions use <b>double</b> values, which use more memory and are typically overkill for most work created in Processing. We do not plan to add support for <b>double</b> values, as doing so would require increasing the number of API functions significantly.
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</td>
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</tr>
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<tr class=""><th scope="row">Syntax</th><td><pre>
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float var
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float var = value
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</pre></td></tr>
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<tr class=""> <th scope="row">Parameters</th><td><table cellpadding="0" cellspacing="0" border="0"><tr class="">
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<th scope="row" class="code">var</th>
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<td>variable name referencing the float</td>
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</tr>
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<tr class="">
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<th scope="row" class="code">value</th>
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<td>any floating-point value</td>
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</tr></table></td> </tr>
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<tr class=""><th scope="row">Related</th><td><a class="code" href="int.html">int</a><br />
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<a class="code" href="double.html">double</a><br /></td></tr>
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</table>
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Updated on April 30, 2017 02:33:22pm EDT<br /><br />
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