# Introduction - Format string

• %d or %i: Argument will be used as decimal integer (signed or unsigned)
• %o: An octal unsigned integer
• %u: An unsigned decimal integer - this means negative numbers will wrap around
• %x or %X: An unsigned hexadecimal integer
• %f, %g or %G: A floating-point number. %f defaults to 6 places after the decimal point (which is locale-dependent - e.g. in de_DE it will be a ,). %g and %G will trim trailing zeroes and switch to scientific notation (like %e) if the numbers get small or large enough.
• %e or %E: A floating-point number in scientific (XXXeYY) notation
• %s: A string
• %b: As a string, interpreting backslash escapes, except that octal escapes are of the form 0 or 0ooo.
• %n: Write the number of characters printed thus far to an int variable