What are the required steps to convert base 10 integer
number 110 129 734 699 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;
- 110 129 734 699 ÷ 2 = 55 064 867 349 + 1;
- 55 064 867 349 ÷ 2 = 27 532 433 674 + 1;
- 27 532 433 674 ÷ 2 = 13 766 216 837 + 0;
- 13 766 216 837 ÷ 2 = 6 883 108 418 + 1;
- 6 883 108 418 ÷ 2 = 3 441 554 209 + 0;
- 3 441 554 209 ÷ 2 = 1 720 777 104 + 1;
- 1 720 777 104 ÷ 2 = 860 388 552 + 0;
- 860 388 552 ÷ 2 = 430 194 276 + 0;
- 430 194 276 ÷ 2 = 215 097 138 + 0;
- 215 097 138 ÷ 2 = 107 548 569 + 0;
- 107 548 569 ÷ 2 = 53 774 284 + 1;
- 53 774 284 ÷ 2 = 26 887 142 + 0;
- 26 887 142 ÷ 2 = 13 443 571 + 0;
- 13 443 571 ÷ 2 = 6 721 785 + 1;
- 6 721 785 ÷ 2 = 3 360 892 + 1;
- 3 360 892 ÷ 2 = 1 680 446 + 0;
- 1 680 446 ÷ 2 = 840 223 + 0;
- 840 223 ÷ 2 = 420 111 + 1;
- 420 111 ÷ 2 = 210 055 + 1;
- 210 055 ÷ 2 = 105 027 + 1;
- 105 027 ÷ 2 = 52 513 + 1;
- 52 513 ÷ 2 = 26 256 + 1;
- 26 256 ÷ 2 = 13 128 + 0;
- 13 128 ÷ 2 = 6 564 + 0;
- 6 564 ÷ 2 = 3 282 + 0;
- 3 282 ÷ 2 = 1 641 + 0;
- 1 641 ÷ 2 = 820 + 1;
- 820 ÷ 2 = 410 + 0;
- 410 ÷ 2 = 205 + 0;
- 205 ÷ 2 = 102 + 1;
- 102 ÷ 2 = 51 + 0;
- 51 ÷ 2 = 25 + 1;
- 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.
110 129 734 699(10) = 1 1001 1010 0100 0011 1110 0110 0100 0010 1011(2)
3. Determine the signed binary number bit length:
The base 2 number's actual length, in bits: 37.
- 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, 37,
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:
110 129 734 699(10) Base 10 integer number converted and written as a signed binary code (in base 2):
110 129 734 699(10) = 0000 0000 0000 0000 0000 0000 0001 1001 1010 0100 0011 1110 0110 0100 0010 1011
Spaces were used to group digits: for binary, by 4, for decimal, by 3.