The Format Specifiers
Format Specifier Conversion Applied %a Floating-point hexadecimal %A %b Boolean %B %c Character %C %d Decimal integer %h Hash code of the argument %H %e Scientific notation %E %f Decimal floating-point %g Uses %e or %f, whichever is shorter %G %o Octal integer %n Inserts a newline character %s String %S %t Time and date %T %x Integer hexadecimal %X %% Inserts a % sign