Assign it to something.
str = sprintf('The result = %s', result)
It will say str=whatever instead of ans = whatever. If you don't even want that then put a semicolon at the end of the line.
str = sprintf('The result = %s', result);
Now nothing at all will show up in the command window. If you don't want to assign it to a variable but just want some string to be printed to the command window without ans= in front of it then use fprintf() instead of sprintf():
fprintf('The result = %s\n', result);
