Strings are implemented as array of characters. The end of the string is always marked with a null character. Loops are used to manage the string, one character at a time. A test for the null character detects the end of the string. A string constant is specified by a set of double quotes. This string constant has an address; the address of the string. The string's address can be assigned to a pointer. Examples: char course_name[] = "Operating System"; char "depart_name = "ICS"; char "colg_name ={C ', 'C', 'S', 'E', '10'\}; A set of functions in the standard library is designed to perform common operations on strings. These functions are defined in the header file strings.h