What are the required steps to convert base 10 integer
number 110 110 001 268 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;
- 110 110 001 268 ÷ 2 = 55 055 000 634 + 0;
- 55 055 000 634 ÷ 2 = 27 527 500 317 + 0;
- 27 527 500 317 ÷ 2 = 13 763 750 158 + 1;
- 13 763 750 158 ÷ 2 = 6 881 875 079 + 0;
- 6 881 875 079 ÷ 2 = 3 440 937 539 + 1;
- 3 440 937 539 ÷ 2 = 1 720 468 769 + 1;
- 1 720 468 769 ÷ 2 = 860 234 384 + 1;
- 860 234 384 ÷ 2 = 430 117 192 + 0;
- 430 117 192 ÷ 2 = 215 058 596 + 0;
- 215 058 596 ÷ 2 = 107 529 298 + 0;
- 107 529 298 ÷ 2 = 53 764 649 + 0;
- 53 764 649 ÷ 2 = 26 882 324 + 1;
- 26 882 324 ÷ 2 = 13 441 162 + 0;
- 13 441 162 ÷ 2 = 6 720 581 + 0;
- 6 720 581 ÷ 2 = 3 360 290 + 1;
- 3 360 290 ÷ 2 = 1 680 145 + 0;
- 1 680 145 ÷ 2 = 840 072 + 1;
- 840 072 ÷ 2 = 420 036 + 0;
- 420 036 ÷ 2 = 210 018 + 0;
- 210 018 ÷ 2 = 105 009 + 0;
- 105 009 ÷ 2 = 52 504 + 1;
- 52 504 ÷ 2 = 26 252 + 0;
- 26 252 ÷ 2 = 13 126 + 0;
- 13 126 ÷ 2 = 6 563 + 0;
- 6 563 ÷ 2 = 3 281 + 1;
- 3 281 ÷ 2 = 1 640 + 1;
- 1 640 ÷ 2 = 820 + 0;
- 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.
110 110 001 268(10) = 1 1001 1010 0011 0001 0001 0100 1000 0111 0100(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:
110 110 001 268(10) Base 10 integer number converted and written as a signed binary code (in base 2):
110 110 001 268(10) = 0000 0000 0000 0000 0000 0000 0001 1001 1010 0011 0001 0001 0100 1000 0111 0100
Spaces were used to group digits: for binary, by 4, for decimal, by 3.