What are the required steps to convert base 10 integer
number 2 934 587 524 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;
- 2 934 587 524 ÷ 2 = 1 467 293 762 + 0;
- 1 467 293 762 ÷ 2 = 733 646 881 + 0;
- 733 646 881 ÷ 2 = 366 823 440 + 1;
- 366 823 440 ÷ 2 = 183 411 720 + 0;
- 183 411 720 ÷ 2 = 91 705 860 + 0;
- 91 705 860 ÷ 2 = 45 852 930 + 0;
- 45 852 930 ÷ 2 = 22 926 465 + 0;
- 22 926 465 ÷ 2 = 11 463 232 + 1;
- 11 463 232 ÷ 2 = 5 731 616 + 0;
- 5 731 616 ÷ 2 = 2 865 808 + 0;
- 2 865 808 ÷ 2 = 1 432 904 + 0;
- 1 432 904 ÷ 2 = 716 452 + 0;
- 716 452 ÷ 2 = 358 226 + 0;
- 358 226 ÷ 2 = 179 113 + 0;
- 179 113 ÷ 2 = 89 556 + 1;
- 89 556 ÷ 2 = 44 778 + 0;
- 44 778 ÷ 2 = 22 389 + 0;
- 22 389 ÷ 2 = 11 194 + 1;
- 11 194 ÷ 2 = 5 597 + 0;
- 5 597 ÷ 2 = 2 798 + 1;
- 2 798 ÷ 2 = 1 399 + 0;
- 1 399 ÷ 2 = 699 + 1;
- 699 ÷ 2 = 349 + 1;
- 349 ÷ 2 = 174 + 1;
- 174 ÷ 2 = 87 + 0;
- 87 ÷ 2 = 43 + 1;
- 43 ÷ 2 = 21 + 1;
- 21 ÷ 2 = 10 + 1;
- 10 ÷ 2 = 5 + 0;
- 5 ÷ 2 = 2 + 1;
- 2 ÷ 2 = 1 + 0;
- 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.
2 934 587 524(10) = 1010 1110 1110 1010 0100 0000 1000 0100(2)
3. Determine the signed binary number bit length:
The base 2 number's actual length, in bits: 32.
- 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, 32,
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:
2 934 587 524(10) Base 10 integer number converted and written as a signed binary code (in base 2):
2 934 587 524(10) = 0000 0000 0000 0000 0000 0000 0000 0000 1010 1110 1110 1010 0100 0000 1000 0100
Spaces were used to group digits: for binary, by 4, for decimal, by 3.