4.3.4 Format Precision

The meaning of the precision for the various format types is as follows:

e, E, f

the number of digits to be printed after the decimal point.

g, G

the number of significant digits to be printed.

z

the number of significant digits to be printed for each of the real and imaginary parts of the value.

d, i, o, u, x, X

the minimum number of digits to be printed (padded with whitespace, except when the 0 modifier is used, which yields padding with zeros).

s, S

the maximum number of string characters to be printed.

t, T

the number of sexagesimal elements to print.