Sometimes you want a fixed number of characters to be used for a number (for logging for example).
With 5 characters (this includes numbers, decimal points and magnitude):
4000000 => 4.00M
40000 => 40.0K
4000 => 4.00K
400 => 0.40K (400 and 400.0 are wrong as they take 3 and 5 places)
40 => 0.04K or 40.00
4 => 4.000
Sometimes you want a fixed number of characters to be used for a number (for logging for example).
With 5 characters (this includes numbers, decimal points and magnitude):