## String::operator+=(char_t) method


Concatenation assignment operator.

```cpp
String & System::String::operator+=(char_t c)
```


| Parameter | Type | Description |
| --- | --- | --- |
| c | char_t | Character to add to the end of current string. |

### ReturnValue

self reference.

## See Also

* Class [String](../)
* Class [String](../)
* Namespace [System](../../)
* Library [Aspose.TeX for C++](../../../)
## String::operator+=(const String\&) method


Concatenation assignment operator.

```cpp
String & System::String::operator+=(const String &str)
```


| Parameter | Type | Description |
| --- | --- | --- |
| str | const String\& | [String](../) to add to the end of current string. |

### ReturnValue

self reference.

## See Also

* Class [String](../)
* Class [String](../)
* Namespace [System](../../)
* Library [Aspose.TeX for C++](../../../)
## String::operator+=(double) method


Concatenation assignment operator.

```cpp
String & System::String::operator+=(double value)
```


| Parameter | Type | Description |
| --- | --- | --- |
| value | double | [Double](../../double/) to add to the end of current string. |

### ReturnValue

self reference.

## See Also

* Class [String](../)
* Class [String](../)
* Namespace [System](../../)
* Library [Aspose.TeX for C++](../../../)
## String::operator+=(int16_t) method


Concatenation assignment operator.

```cpp
String & System::String::operator+=(int16_t value)
```


| Parameter | Type | Description |
| --- | --- | --- |
| value | int16_t | Short to add to the end of current string. |

### ReturnValue

self reference.

## See Also

* Class [String](../)
* Class [String](../)
* Namespace [System](../../)
* Library [Aspose.TeX for C++](../../../)
## String::operator+=(int32_t) method


Concatenation assignment operator.

```cpp
String & System::String::operator+=(int32_t value)
```


| Parameter | Type | Description |
| --- | --- | --- |
| value | int32_t | Int to add to the end of current string. |

### ReturnValue

self reference.

## See Also

* Class [String](../)
* Class [String](../)
* Namespace [System](../../)
* Library [Aspose.TeX for C++](../../../)
## String::operator+=(int64_t) method


Concatenation assignment operator.

```cpp
String & System::String::operator+=(int64_t value)
```


| Parameter | Type | Description |
| --- | --- | --- |
| value | int64_t | Long to add to the end of current string. |

### ReturnValue

self reference.

## See Also

* Class [String](../)
* Class [String](../)
* Namespace [System](../../)
* Library [Aspose.TeX for C++](../../../)
## String::operator+=(T) method


Concatenation assignment operator.

```cpp
template<typename T,std::enable_if_t< std::is_same< T, bool >::value > *> String & System::String::operator+=(T value)
```


| Parameter | Description |
| --- | --- |
| T | Value type to concatenate with string. Must be bool |

| Parameter | Type | Description |
| --- | --- | --- |
| value | T | [Boolean](../../boolean/) to add to the end of current string. |

### ReturnValue

self reference.

## See Also

* Class [String](../)
* Class [String](../)
* Namespace [System](../../)
* Library [Aspose.TeX for C++](../../../)
## String::operator+=(uint16_t) method


Concatenation assignment operator.

```cpp
String & System::String::operator+=(uint16_t value)
```


| Parameter | Type | Description |
| --- | --- | --- |
| value | uint16_t | Unsigned short to add to the end of current string. |

### ReturnValue

self reference.

## See Also

* Class [String](../)
* Class [String](../)
* Namespace [System](../../)
* Library [Aspose.TeX for C++](../../../)
## String::operator+=(uint32_t) method


Concatenation assignment operator.

```cpp
String & System::String::operator+=(uint32_t value)
```


| Parameter | Type | Description |
| --- | --- | --- |
| value | uint32_t | Unsigned int to add to the end of current string. |

### ReturnValue

self reference.

## See Also

* Class [String](../)
* Class [String](../)
* Namespace [System](../../)
* Library [Aspose.TeX for C++](../../../)
## String::operator+=(uint64_t) method


Concatenation assignment operator.

```cpp
String & System::String::operator+=(uint64_t value)
```


| Parameter | Type | Description |
| --- | --- | --- |
| value | uint64_t | Unsigned long to add to the end of current string. |

### ReturnValue

self reference.

## See Also

* Class [String](../)
* Class [String](../)
* Namespace [System](../../)
* Library [Aspose.TeX for C++](../../../)
## String::operator+=(uint8_t) method


Concatenation assignment operator.

```cpp
String & System::String::operator+=(uint8_t value)
```


| Parameter | Type | Description |
| --- | --- | --- |
| value | uint8_t | [Byte](../../byte/) to add to the end of current string. |

### ReturnValue

self reference.

## See Also

* Class [String](../)
* Class [String](../)
* Namespace [System](../../)
* Library [Aspose.TeX for C++](../../../)