How do I change the number of decimal places my output has

I need to run a program so it shows no decimal places. I also need to run it again with showing one decimal place

[James Tursa]

Please show some examples for input & desired output. Do you want the data clipped or rounded etc, or do you just want the display of the numbers to be a certain way?

Answer 1

[Walter Roberson]

See the "fieldwidth" specification of fprintf and sprintf().

So like this:

value = sqrt(pi);
for numplaces = 0 : 5
  fprintf('%.*f\n', numplaces, value);
end

Note: this rounds the values to the appropriate number of decimal places.