format — Change output format
format changes the way in which numbers are displayed. If it
is invoked with no arguments, then output format is reset to the
default values. If you supply a single argument, that is the new
precision, which is the number of digits to the right of the decimal
place. If you supply two arguments, then the first is the new width,
and the second is the new precision. Width is the total number of
characters requires, including a decimal point. The default value is
a width is nine, and a precision of three.
Subsections