macro/command/ifdefined.html

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<h1>ifdefined</h1>

<p>
Checks the type.
</p>

<pre class="macro-syntax">
ifdefined &lt;var&gt;
</pre>

<h2>Remarks</h2>

<p>
Sets the type of &lt;var&gt;. One of the following values in the system variable "result":
</p>

<table>
 <tr>
  <th>Value</th>
  <th>Meaning</th>
 </tr>
 <tr>
  <td>0</td>
  <td>undefined</td>
 </tr>
 <tr>
  <td>1</td>
  <td>integer</td>
 </tr>
 <tr>
  <td>3</td>
  <td>string</td>
 </tr>
 <tr>
  <td>4</td>
  <td>label</td>
 </tr>
</table>

<h2>Example</h2>

<pre class="macro-example">
ifdefined data
int2str valstr result
messagebox valstr 'variable type'
</pre>

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