ln( ) This is the default constructor. It creates a large integer with a value of zero. ln( long a ) Create a large integer from the passed long. The initial value of the large integer will be a. ln( unsigned long a ) Create a large integer from the unsigned long variable a. ln( char *a ) Create a large integer from the character array (string) a. It is assumed that the number within the string is in decimal format. It can contain an optional leading minus sign. ln( int a ) Create a large integer from the integer a. ln( unsigned int a ) Create a large integer from the unsigned integer a.