30 lines
1.7 KiB
HTML
30 lines
1.7 KiB
HTML
<!DOCTYPE html>
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<html>
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<head>
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<link rel="stylesheet" href="style.css">
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<meta content="text/html; charset=UTF-8" http-equiv="content-type">
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<title>RCBasic Scope [RCBasic Doc] </title>
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</head>
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<body>
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<p><h2>SCOPE </h2></p>
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<p>
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Scope refers to where you are able to access a variable. Basically variables cannot be accessed from outside the scope they are created in. Look at the following:
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</p>
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<p id="rc_code"><code>
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A = <span class="rc_number">5</span> <br>
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<br>
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<span class="rc_keyword">While</span> A < <span class="rc_number">10</span> <br>
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B = <span class="rc_number">1</span> <span class="rc_comment">'----- B is created inside this loop and cannot be accessed outside of this loop </span><br>
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A = A + <span class="rc_number">1</span> <span class="rc_comment">'----- A was created before this loop started so it will be able to be used after this loop ends </span><br>
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<span class="rc_keyword">Wend</span> <br>
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<br>
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<span class="rc_keyword">Print</span> B <br>
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</code></p>
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<p>
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The above program WILL NOT COMPILE. That is because the variable B was created inside the scope of the WHILE loop and nothing outside the WHILE loop will be able to access it. The variable A was created outside the WHILE loop so the variable A could be used anywhere in this example. So a variable can go into a deeper scope than where it was created but it cannot go to a lesser scope than where it was created. A scope deepens every time a new block is started. Blocks refer to the code within a loop, within a Function, or within a Sub Routine.
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</p>
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<p>
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</body>
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</html> |