---
title: "default namespace | Microsoft Docs"
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  - "default_CPP"
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---
# default namespace
The `default` namespace scopes the built-in types that are supported by C++/CX.  
  
## Syntax  
  
```  
namespace default;  
```  
  
### Members  
 All built-in types inherit the following members.  
  
|||  
|-|-|  
|[default::(type_name)::Equals](../cppcx/default-type-name-equals-method.md)|Determines whether the specified object is equal to the current object.|  
|[default::(type_name)::GetHashCode](../cppcx/default-type-name-gethashcode-method.md)|Returns the hash code for this instance.|  
|[default::(type_name)::GetType](../cppcx/default-type-name-gettype-method.md)|Returns a string that represents the current type.|  
|[default::(type_name)::ToString](../cppcx/default-type-name-tostring-method.md)|Returns a string that represents the current type.|  
  
### Built-in types  
  
|Name|Description|  
|----------|-----------------|  
|`char16`|A 16-bit nonnumeric value that represents a Unicode (UTF-16) code point.|  
|`float32`|A 32-bit IEEE 754 floating-point number.|  
|`float64`|A 64-bit IEEE 754 floating-point number.|  
|`int16`|A 16-bit signed integer.|  
|`int32`|A 32-bit signed integer.|  
|`int64`|A 64-bit signed integer.|  
|`int8`|An 8-bit signed numeric value.|  
|`uint16`|A 16-bit unsigned integer.|  
|`uint32`|A 32-bit unsigned integer.|  
|`uint64`|A 64-bit unsigned integer.|  
|`uint8`|An 8-bit unsigned numeric value.|  
  
### Requirements  
 **Header:** vccorlib.h  
  
## See Also  
 [Visual C++ Language Reference](../cppcx/visual-c-language-reference-c-cx.md)