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<title>Variable Functions</title>
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<div class="title" title="Variable Functions">
<span>Variable Functions</span>
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<h1>Variable Functions</h1>
<p>The functions on this page are designed to deal with all the different variables and variable types when using the GameMaker Language in your games. For more information on variables, please see the page on <a href="../../GML_Overview/Variables_And_Variable_Scope.htm">Variables and Variable Scope</a>.</p>
<p>The following variable functions are available:</p>
<ul class="colour">
<li><a href="variable_instance_exists.htm">variable_instance_exists</a></li>
<li><a href="variable_instance_get_names.htm">variable_instance_get_names</a></li>
<li><a href="variable_instance_names_count.htm">variable_instance_names_count</a></li>
<li><a href="variable_instance_get.htm">variable_instance_get</a></li>
<li><a href="variable_instance_set.htm">variable_instance_set</a></li>
<li><a href="variable_global_exists.htm">variable_global_exists</a></li>
<li><a href="variable_global_get.htm">variable_global_get</a></li>
<li><a href="variable_global_set.htm">variable_global_set</a></li>
<li><a href="variable_struct_exists.htm">variable_struct_exists</a></li>
<li><a href="variable_struct_get.htm">variable_struct_get</a></li>
<li><a href="variable_struct_set.htm">variable_struct_set</a></li>
<li><a href="variable_struct_get_names.htm">variable_struct_get_names</a></li>
<li><a href="variable_struct_names_count.htm">variable_struct_names_count</a></li>
<li><a href="instance_of.htm">instance_of</a></li>
</ul>
<p> </p>
<p>There are a few functions associated with the use of <a href="../../GML_Overview/Arrays.htm">Arrays</a> too. These are designed to give you flexibility in your code, and will permit you to create more functional and dynamic arrays when making your games.
These functions are:</p>
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<li><a href="array_create.htm">array_create</a></li>
<li><a href="array_copy.htm">array_copy</a></li>
<li><a href="array_equals.htm">array_equals</a></li>
<li><a href="array_get.htm">array_get</a></li>
<li><a href="array_set.htm">array_set</a></li>
<li><a href="array_length.htm">array_length</a></li>
<li><a href="array_resize.htm">array_resize</a></li>
<li><a href="array_length_1d.htm">array_length_1d (<em>deprecated</em>)</a></li>
<li><a href="array_length_2d.htm">array_length_2d (<em>deprecated</em>)</a></li>
<li><a href="array_height_2d.htm">array_height_2d (<em>deprecated</em>)</a></li>
</ul>
<p> </p>
<p>These next functions are all related to using <a href="../../GML_Overview/Method_Variables.htm">Method Variables</a>:</p>
<ul class="colour">
<li><a href="method.htm">method</a></li>
<li><a href="method_get_self.htm">method_get_self</a></li>
<li><a href="method_get_index.htm">method_get_index</a></li>
</ul>
<p> </p>
<p>Finally, you also have the following functions for determining variable type (for more information on data types, please see <a href="../../GML_Overview/Data_Types.htm">here</a>, and see here for <a href="../../../Additional_Information/Type_Tables.htm">Type Tables</a>):</p>
<ul class="colour">
<li><a href="is_string.htm">is_string</a></li>
<li><a href="is_real.htm">is_real</a></li>
<li><a href="is_numeric.htm">is_numeric</a></li>
<li><a href="is_bool.htm">is_bool</a></li>
<li><a href="is_array.htm">is_array</a></li>
<li><a href="is_struct.htm">is_struct</a></li>
<li><a href="is_method.htm">is_method</a></li>
<li><a href="is_ptr.htm">is_ptr</a></li>
<li><a href="is_int32.htm">is_int32</a></li>
<li><a href="is_int64.htm">is_int64</a></li>
<li><a href="is_vec3.htm">is_vec3</a></li>
<li><a href="is_vec4.htm">is_vec4</a></li>
<li><a href="is_matrix.htm">is_matrix</a></li>
<li><a href="is_undefined.htm">is_undefined</a></li>
<li><a href="is_nan.htm">is_nan</a></li>
<li><a href="is_infinity.htm">is_infinity</a></li>
<li><a href="typeof.htm">typeof</a></li>
<li><a href="bool.htm">bool</a></li>
<li><a href="ptr.htm">ptr</a></li>
<li><a href="int64.htm">int64</a></li>
</ul>
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