strcat
From cppreference.com
                    
                                        
                    
                    
                                                            
                    | Defined in header <string.h>
  | ||
| char *strcat( char *dest, const char *src ); | ||
Appends a byte string pointed to by src to a byte string pointed to by dest. The resulting byte string is null-terminated. If the strings overlap, the behavior is undefined. 
| Contents | 
[edit] Parameters
| dest | - | pointer to the null-terminated byte string to append to | 
| src | - | pointer to the null-terminated byte string to copy from | 
[edit] Return value
dest
[edit] Example
Output:
Hello World!
[edit] See also
| concatenates a certain amount of characters of two strings (function) | |
| copies one string to another (function) | |