How do I set the exponential size in fprintf?

I'm trying to get the fprintf command to output specifically with the e6 scientific notation size. Is this possible?

The function is:

function [ dv_km3 dv_m3 ] = r2dv( r )
%r2dv % this script converts radius values for a sphere (m)
% to volume (km3 and m3)
format long

dv_m3 = (4/3)*pi*r^3
% fprintf('dv_m3 = %d.e\n',dv_m3)

dv_km3 = dv_m3/(10^9)
% fprintf('dv_km3 = %d\n',dv_km3)

end

I would like the dv_m3 to output always as x10^6 (10e6)

Answer 1

[Star Strider]

One possibility:

x = rand(1,10) * 1E8;
xe6 = sprintf('%.3fE+6\n', x./1E6);

Experiment to get the result you want.

[MJackP]

Perfect, thanks for the mega-fast reply!

For anyone else using this, my code incorporating his answer is:

function [ dv_km3 dv_m3 ] = r2dv( r )
%r2dv % this script converts radius values for a sphere (m)
% to volume (km3 and m3)

dv_m3 = (4/3)*pi*r^3;
fprintf('dv_m3 = %.3fe+6\n',dv_m3./1E6)

dv_km3 = dv_m3/(10^9);
fprintf('dv_km3 = %.3f\n',dv_km3)

end

[Star Strider]

My pleasure!