printf: formatting and printing data
printf FORMAT ARG …
The FORMAT string can contain ordinary characters, escape sequences, and format specifiers. Ordinary characters are printed unchanged to the standard output. Escape sequences are converted to the characters they represent. Format specifiers are replaced with arguments from the command line.
Escape sequences are single letters preceded by a backslash:
• \a: : Alert (bell)
• \b: Backspace
• \e: Escape character
• \f: Form feed
• \n: Newline
• \r: Carriage return
• \t: Horizontal tab
• \v: Vertical tab
• \\: Backslash
• \nnn: A character specified by one to three octal digits
• \xHH: A character specified by one or two hexadecimal digits
