PNG to Base64 string

[Didier Lachieze]

(12-27-2018 05:27 AM)Jacob Wall Wrote:  For anyone more familiar with these things; is there a quicker and simpler way to get from {137, 80, 78} to {34, 21, 1, 14} on the HP Prime? Any suggestions would be appreciated.

Here is how I would do it :

Code:

L0:={137,80,78}; L1:={};
N:=L0(1)*256^2+L0(2)*256+L0(3);
FOR I FROM 3 DOWNTO 0 DO
  L1(0):=IP(N/64^I);
  N:=N-L1(0)*64^I;
END;

L1 will return {34,21,1,14}, but you can also do the lookup and build the Base64 string directly in the loop rather than building L1.