What are the required steps to convert base 10 integer
number 110 001 010 010 880 to signed binary code (in base 2)?
- A signed integer, written in base ten, or a decimal system number, is a number written using the digits 0 through 9 and the sign, which can be positive (+) or negative (-). If positive, the sign is usually not written. A number written in base two, or binary, is a number written using only the digits 0 and 1.
1. Divide the number repeatedly by 2:
Keep track of each remainder.
Stop when you get a quotient that is equal to zero.
- division = quotient + remainder;
- 110 001 010 010 880 ÷ 2 = 55 000 505 005 440 + 0;
- 55 000 505 005 440 ÷ 2 = 27 500 252 502 720 + 0;
- 27 500 252 502 720 ÷ 2 = 13 750 126 251 360 + 0;
- 13 750 126 251 360 ÷ 2 = 6 875 063 125 680 + 0;
- 6 875 063 125 680 ÷ 2 = 3 437 531 562 840 + 0;
- 3 437 531 562 840 ÷ 2 = 1 718 765 781 420 + 0;
- 1 718 765 781 420 ÷ 2 = 859 382 890 710 + 0;
- 859 382 890 710 ÷ 2 = 429 691 445 355 + 0;
- 429 691 445 355 ÷ 2 = 214 845 722 677 + 1;
- 214 845 722 677 ÷ 2 = 107 422 861 338 + 1;
- 107 422 861 338 ÷ 2 = 53 711 430 669 + 0;
- 53 711 430 669 ÷ 2 = 26 855 715 334 + 1;
- 26 855 715 334 ÷ 2 = 13 427 857 667 + 0;
- 13 427 857 667 ÷ 2 = 6 713 928 833 + 1;
- 6 713 928 833 ÷ 2 = 3 356 964 416 + 1;
- 3 356 964 416 ÷ 2 = 1 678 482 208 + 0;
- 1 678 482 208 ÷ 2 = 839 241 104 + 0;
- 839 241 104 ÷ 2 = 419 620 552 + 0;
- 419 620 552 ÷ 2 = 209 810 276 + 0;
- 209 810 276 ÷ 2 = 104 905 138 + 0;
- 104 905 138 ÷ 2 = 52 452 569 + 0;
- 52 452 569 ÷ 2 = 26 226 284 + 1;
- 26 226 284 ÷ 2 = 13 113 142 + 0;
- 13 113 142 ÷ 2 = 6 556 571 + 0;
- 6 556 571 ÷ 2 = 3 278 285 + 1;
- 3 278 285 ÷ 2 = 1 639 142 + 1;
- 1 639 142 ÷ 2 = 819 571 + 0;
- 819 571 ÷ 2 = 409 785 + 1;
- 409 785 ÷ 2 = 204 892 + 1;
- 204 892 ÷ 2 = 102 446 + 0;
- 102 446 ÷ 2 = 51 223 + 0;
- 51 223 ÷ 2 = 25 611 + 1;
- 25 611 ÷ 2 = 12 805 + 1;
- 12 805 ÷ 2 = 6 402 + 1;
- 6 402 ÷ 2 = 3 201 + 0;
- 3 201 ÷ 2 = 1 600 + 1;
- 1 600 ÷ 2 = 800 + 0;
- 800 ÷ 2 = 400 + 0;
- 400 ÷ 2 = 200 + 0;
- 200 ÷ 2 = 100 + 0;
- 100 ÷ 2 = 50 + 0;
- 50 ÷ 2 = 25 + 0;
- 25 ÷ 2 = 12 + 1;
- 12 ÷ 2 = 6 + 0;
- 6 ÷ 2 = 3 + 0;
- 3 ÷ 2 = 1 + 1;
- 1 ÷ 2 = 0 + 1;
2. Construct the base 2 representation of the positive number:
Take all the remainders starting from the bottom of the list constructed above.
110 001 010 010 880(10) = 110 0100 0000 1011 1001 1011 0010 0000 0110 1011 0000 0000(2)
3. Determine the signed binary number bit length:
The base 2 number's actual length, in bits: 47.
- A signed binary's bit length must be equal to a power of 2, as of:
- 21 = 2; 22 = 4; 23 = 8; 24 = 16; 25 = 32; 26 = 64; ...
- The first bit (the leftmost) is reserved for the sign:
- 0 = positive integer number, 1 = negative integer number
The least number that is:
1) a power of 2
2) and is larger than the actual length, 47,
3) so that the first bit (leftmost) could be zero
(we deal with a positive number at this moment)
=== is: 64.
4. Get the positive binary computer representation on 64 bits (8 Bytes):
If needed, add extra 0s in front (to the left) of the base 2 number, up to the required length, 64:
110 001 010 010 880(10) Base 10 integer number converted and written as a signed binary code (in base 2):
110 001 010 010 880(10) = 0000 0000 0000 0000 0110 0100 0000 1011 1001 1011 0010 0000 0110 1011 0000 0000
Spaces were used to group digits: for binary, by 4, for decimal, by 3.