1. Divide the number repeatedly by 2:
Keep track of each remainder.
We stop when we get a quotient that is equal to zero.
- division = quotient + remainder;
- 97 698 295 ÷ 2 = 48 849 147 + 1;
- 48 849 147 ÷ 2 = 24 424 573 + 1;
- 24 424 573 ÷ 2 = 12 212 286 + 1;
- 12 212 286 ÷ 2 = 6 106 143 + 0;
- 6 106 143 ÷ 2 = 3 053 071 + 1;
- 3 053 071 ÷ 2 = 1 526 535 + 1;
- 1 526 535 ÷ 2 = 763 267 + 1;
- 763 267 ÷ 2 = 381 633 + 1;
- 381 633 ÷ 2 = 190 816 + 1;
- 190 816 ÷ 2 = 95 408 + 0;
- 95 408 ÷ 2 = 47 704 + 0;
- 47 704 ÷ 2 = 23 852 + 0;
- 23 852 ÷ 2 = 11 926 + 0;
- 11 926 ÷ 2 = 5 963 + 0;
- 5 963 ÷ 2 = 2 981 + 1;
- 2 981 ÷ 2 = 1 490 + 1;
- 1 490 ÷ 2 = 745 + 0;
- 745 ÷ 2 = 372 + 1;
- 372 ÷ 2 = 186 + 0;
- 186 ÷ 2 = 93 + 0;
- 93 ÷ 2 = 46 + 1;
- 46 ÷ 2 = 23 + 0;
- 23 ÷ 2 = 11 + 1;
- 11 ÷ 2 = 5 + 1;
- 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.
97 698 295(10) = 101 1101 0010 1100 0001 1111 0111(2)
3. Determine the signed binary number bit length:
The base 2 number's actual length, in bits: 27.
- 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) indicates 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, 27,
3) so that the first bit (leftmost) could be zero
(we deal with a positive number at this moment)
=== is: 32.
4. Get the positive binary computer representation on 32 bits (4 Bytes):
If needed, add extra 0s in front (to the left) of the base 2 number, up to the required length, 32.
Decimal Number 97 698 295(10) converted to signed binary in two's complement representation:
Spaces were used to group digits: for binary, by 4, for decimal, by 3.