HP49-50G Square root many (50 or more) digits

[Gil]

Just corrected the code
for cases of the type sqrt (2E-2).

Besides you can now choose how many digits you want to be calculated by using as input:
{X xx},
- where X is the number of which you want the square root
- and where cx is number of digits to be calculated.

By default, the number xx is 50.
In that case, you can directly enter as argument:
X or "XX" (double quotation mark).

The full, new code is:
\<< "Version 4

Give 
1 Arg


\[] 2.5 or 2.5E6 or
-2.5 or 2.5-E6 or

\[] or" "1234567891234567" "with quotation mark!

\[] or {X xx}
with X: like above
& xx: # digits
" 3 DROPN DUP TYPE 5 ==
IF
THEN OBJ\-> DROP
ELSE 50 "Put above 
100
 if
you want 
100
 digits" DROP
END \-> digit
\<< DUP TYPE 2 \=/
IF
THEN \->STR
END DUPDUP SIZE SWAP OBJ\-> \-> x0 s0 x1
\<< -3 SF -105 CF "\v/" x0 + x1 \v/ x0 "-" "" SREPL DROP 'x0' STO x0 DUP "E" POS DUP 0 ==
IF
THEN DROP 1 s0
ELSE 1 SWAP 1 -
END SUB "." "" SREPL DROP OBJ\-> \->STR DUP SIZE 's0' STO 'x0' STO x1 MANT x1 XPON \-> man xpo
\<< s0 2 / FP 0 \=/
IF
THEN 0 x0 xpo 2 / FP 0 \=/ { SWAP } IFT +
ELSE xpo 2 / FP 0 ==
IF
THEN 0 x0 + 0 +
ELSE x0
END
END DUPDUP 'x0' STO SIZE 2 / \-> n sz
\<< { } 0 sz 1 -
FOR i n i 2 * 1 + DUP 1 + SUB OBJ\-> +
NEXT 'n' STO 0 0 0 0 1 \-> a b m s k
\<<
WHILE k digit \<=
REPEAT a b - 100 * 'a' STO k sz \<=
IF
THEN n k GET 'a' STO+
END 1 'k' STO+ 9 's' STO
WHILE 20 m * s + s * a >
REPEAT -1 's' STO+
END 20 m * s + s * 'b' STO 10 m * s + 'm' STO
END m \->STR \-> st
\<< st 2 digit
FOR i st i digit SUB OBJ\-> 0 ==
IF
THEN digit i - 1 + " last # of \v/ =0" + 4 ROLLD 1 i 1 - SUB digit 'i' STO
END
NEXT OBJ\-> DUP2 \-> r1 r2
\<< r1 DUP TYPE 1 ==
IF
THEN IM
END MANT \->STR "." "" SREPL DROP DUP "E" POS DUP 0 >
IF
THEN 1 - 1 SWAP SUB OBJ\->
ELSE DROP OBJ\->
END r2 ==
IF
THEN DROP
END
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