Long decimal results instead of scientific notation?

[Joe Horn]

(06-23-2021 09:08 PM)matalog Wrote:  Is there a way to get the prime to show all possible leading zeroes in CAS (or normal) mode, for example, to show 0.00000000000000000000981 instead of 9.81E-21?

I have it in standard notation mode.

Sort of. In CAS, the command:
format(9.81E-21,"f23")
returns the string "0.00000000000000000000981"

A program could be written, I suppose, which would calculate the necessary second argument of format() to obtain the desired output for any given input.

If you're looking for a display mode that automatically displays all leading zeros, sorry, there is no such mode.