Decimal to binary in HP Prime

04162019, 05:02 PM
Post: #1




Decimal to binary in HP Prime
How to perform the conversion of a number such as 3.2672 decimal to binary in Hp Prime?
Leo 

04162019, 07:16 PM
Post: #2




RE: Decimal to binary in HP Prime
R>B() will convert an integer to binary  if your base is set to 2.
I don't know that it can convert floating point. 

04162019, 10:27 PM
(This post was last modified: 04182019 12:00 AM by Albert Chan.)
Post: #3




RE: Decimal to binary in HP Prime
I try this in XCas:
bits(x) := convert(convert(trunc(x),base,2),base,10) x = exact(3.2672) > 2042/625 bits(x * 2^22) > 110100010001100111001110 3.2672 ~ 0b11.0100010001100111001110 (24 bits) For *exact* conversion, we need to get number of repeated bits: order(a,n) := {local k=0, t=1 mod n; repeat t*=a; k++ until t=1; k} Since denominator is odd, we can get repeated bits = order(2,625) = 500 bits(x * 2^500), we got: x = 0b11.( 01000100011001110011100000011101011111011011111101 00100001111111110010111001001000111010001010011100 01110111100110100110101101010000101100001111001001 11101110110010111111101100010101101101010111001111 10101010110011011001111010000011111001000010010110 10111011100110001100011111100010100000100100000010 11011110000000001101000110110111000101110101100011 10001000011001011001010010101111010011110000110110 00010001001101000000010011101010010010101000110000 01010101001100100110000101111100000110111101101001) 

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