If there is a necessity to introduce a double quote ("), you should put a reverse slash () before it. Any special character constants following the reverse slash () can be introduced in a string. The length of a string constant ranges from 0 through 255 characters. If the length of a string constant exceeds its maximum, the excessive characters on the right-hand side will be truncated and the compiler will give the corresponding warning. A combination of two characters, the first of which is the reverse slash (), is commonly accepted and perceived by most programs as an instruction to execute a certain text formatting. This combination is not displayed in the text. For example, the combination of
indicates the necessity of a line feed; demands tabulation and so on.