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The goal is to make the Euler-Mascheroni Constant available on the HP-15C and the HP-42S, rounded to 10 and 12 digits, using the least number of steps and the least byte-count, respectively. On the latter a truncated result should be nice as well. This is not being presented as a challenge, but rather as a request for sharing better solutions I am not aware of. Thanks in advance!

HP-15C:

Code:

   001 { 42 21 12 } f LBL A

   002 {        1 } 1

   003 {        0 } 0

   004 {        4 } 4

   005 {        8 } 8

   006 {        1 } 1

   007 {       15 } 1/x

   008 {       48 } .

   009 {        4 } 4

   010 {       40 } +

   011 {        2 } 2

   012 {    43 12 } g ln

   013 {       10 } /

   014 {    43 32 } g RTN

Code:

   001 { 42 21 11 } f LBL A

   002 {        5 } 5

   003 {        7 } 7

   004 {        7 } 7

   005 {        2 } 2

   006 {        1 } 1

   007 {        5 } 5

   008 {        6 } 6

   009 {        6 } 6

   010 {        4 } 4

   011 {        9 } 9

   012 {    44 36 } STO 36

   013 {    45 36 } RCL 36

   014 {    43 32 } g RTN

HP-42S:

Code:

00 { 21-Byte Prgm }

01▸LBL "g"

02 PI

03 SQRT

04 3.2581173

05 E↑X-1

06 1/X

07 -

08 1/X

09 END

Code:

00 { 19-Byte Prgm }

01▸LBL "g"

02 1.7324547146

03 1/X

04 END

Listings by JRPN and Free42 simulators, respectively.

Gerson W. Barbosa