Format Specifiers in C

The following format specifiers can be used when programming in C.


%d (or %i) int
%c char
%f float
%lf double
%s string
%x hexadecimal


By specifying an integer between the % and the format specifier, the number of spaces displayed can be controlled easily.


%9d will display 9 spaces before a character is displayed
%09 will display 9 zeros (0) before a character is displayed
%-9d a negative sign will left align the result
%-09d a zero(0) format will be ignored when a negative sign is used
%1.1f an integer after the period (.) specifies the number of decimal places


Other specifiers that may be needed to control the output


\n new line
\t tab
\b backspace