escape sequence characters

• escape sequences are used in formatting input and output
• an escape sequences always begins with a backward slash and is followed character
• c supports some special escape sequence characters that are used to do special task
• these are also called as backslash characters
• some of the escape sequence characters are as follows:

character constant	meaning
\n	new line
\b	backspace
\t	horizontal tab
\f	form feed
\a	alert
\r	carriage return
\v	verticaltab
\?	question mark
\'	single quote
\"	double quote
\\	backslash
\0	Null