Editing Printf (section)

===Precision field===

The precision field usually specifies a {{em|maximum}} limit of the output, depending on the particular formatting type. For [[floating-point]] numeric types, it specifies the number of digits to the right of the decimal point to which the output should be rounded; for {{code|%g}} and {{code|%G}} it specifies the total number of [[significant digits]] (before and after the decimal, not including leading or trailing zeroes) to round to. For the [[string (computer science)|string type]], it limits the number of characters that should be output, after which the string is truncated.

The precision field may be omitted, or a numeric integer value, or a dynamic value when passed as another argument when indicated by an asterisk ({{code|*}}). For example, {{code|printf("%.*s", 3, "abcdef");|c}} outputs {{samp|abc}}.