86 lines
4.5 KiB
HTML
86 lines
4.5 KiB
HTML
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<?xml version="1.0" encoding="utf-8"?>
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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:MadCap="http://www.madcapsoftware.com/Schemas/MadCap.xsd" MadCap:lastBlockDepth="6" MadCap:lastHeight="94" MadCap:lastWidth="853" MadCap:disableMasterStylesheet="true" MadCap:tocPath="" MadCap:InPreviewMode="false" MadCap:PreloadImages="false" MadCap:RuntimeFileType="Topic" MadCap:TargetType="WebHelp" lang="en-us" xml:lang="en-us" MadCap:PathToHelpSystem="../../../" MadCap:HelpSystemFileName="Default.xml" MadCap:SearchType="Stem">
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<head><title>LET</title>
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<link href="../../Resources/Stylesheets/BSE_Help.css" rel="stylesheet" />
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<script src="../../SkinSupport/MadCapAll.js" type="text/javascript">
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</script>
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</head>
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<body>
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<h1 class="code">LET</h1>
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<div class="ImagePlusCaption">
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<div class="Col2">
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<p>
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<img src="../../graphics/pgm_icon1.gif" border="0" alt="BS1 icon" title="BS1 icon" />
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</p>
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</div>
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<p style="text-align: right;"> </p>
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</div>
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<p class="clear"> </p>
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<p> </p>
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<p class="PlainText">Syntax: {<span class="keyword_in_text">LET</span>}<i>Variable </i>=<i> Value</i></p>
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<h2>Function</h2>
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<p class="PlainText">Sets <i>Variable</i> equal to the value of <i>Value</i>.
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</p>
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<ul>
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<li value="1"><b><i>Variable</i></b> is a variable/constant/expression (0-65535).</li>
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<li value="2"><b><i>Value</i></b> is a variable which will be set equal to <i>Value</i>. </li>
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</ul>
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<h2>Explanation<br /></h2>
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<p class="PlainText"><span class="keyword_in_text">LET</span> is an optional instruction for the BASIC Stamp 1 that can be used with variable assignment statements, such as A = 5 and B = A + 2, etc. This instruction is not required and only exits on the BASIC Stamp 1. <span class="keyword_in_text">LET</span> was a commonly used command in early forms of BASIC, and was originally included in the BS1 command set to accommodate programmers from that generation. Parallax recommends that all new BASIC Stamp 1 programs use assignment statements without the <span class="keyword_in_text">LET</span> command.</p>
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<p class="PlainText">The example below demonstrates the use of <span class="keyword_in_text">LET</span> in assignment statements. Note that the Lunchtime and Dinnertime routines do essentially the same type of thing, but the Dinnertime approach is recommended.</p><pre class="BScode" xml:space="preserve">' {$STAMP BS1}
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' {$PBASIC 1.0}
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' {$STAMP BS1}
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SYMBOL salad = B1
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SYMBOL bread = B2
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SYMBOL soup = B3
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SYMBOL lunch = B4
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SYMBOL dinner = B5
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Lunchtime:
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LET salad = 3
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LET bread = 1
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LET soup = 4
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lunch = salad + bread + soup
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DEBUG "Lunch = $", #lunch, "plus local tax.", CR
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Dinnertime:
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salad = 4
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bread = 2
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soup = 5
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dinner = salad + bread + soup
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DEBUG "Dinner = $",#dinner, "plus local tax.", CR
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</pre>
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<div class="Col2">
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<div class="MasterFoot">
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<p MadCap:conditions="BSEconditions.BSEWebHelp (Primary)-INCLUDE"><a href="../../HomeTopics/HomePage.htm">Go to Welcome page</a>
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</p>
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</div>
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</div>
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<div class="Col2">
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<div class="MasterFoot">
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<p style="text-align: right;"><span class="ContactInfoProjectName">BASIC Stamp Help</span> <![CDATA[ ]]><span class="ContactInfoVersion#">Version 2.5.4</span> <![CDATA[ ]]></p>
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<p style="text-align: right;">Copyright © <span class="ContactInfoCompanyName">Parallax Inc.</span></p>
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<p style="text-align: right;"><span class="SystemShortDate">8/8/2012</span>
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</p>
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</div>
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</div>
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