What are the required steps to convert base 10 integer
number -5 202 307 033 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. Start with the positive version of the number:
|-5 202 307 033| = 5 202 307 033
2. 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;
- 5 202 307 033 ÷ 2 = 2 601 153 516 + 1;
- 2 601 153 516 ÷ 2 = 1 300 576 758 + 0;
- 1 300 576 758 ÷ 2 = 650 288 379 + 0;
- 650 288 379 ÷ 2 = 325 144 189 + 1;
- 325 144 189 ÷ 2 = 162 572 094 + 1;
- 162 572 094 ÷ 2 = 81 286 047 + 0;
- 81 286 047 ÷ 2 = 40 643 023 + 1;
- 40 643 023 ÷ 2 = 20 321 511 + 1;
- 20 321 511 ÷ 2 = 10 160 755 + 1;
- 10 160 755 ÷ 2 = 5 080 377 + 1;
- 5 080 377 ÷ 2 = 2 540 188 + 1;
- 2 540 188 ÷ 2 = 1 270 094 + 0;
- 1 270 094 ÷ 2 = 635 047 + 0;
- 635 047 ÷ 2 = 317 523 + 1;
- 317 523 ÷ 2 = 158 761 + 1;
- 158 761 ÷ 2 = 79 380 + 1;
- 79 380 ÷ 2 = 39 690 + 0;
- 39 690 ÷ 2 = 19 845 + 0;
- 19 845 ÷ 2 = 9 922 + 1;
- 9 922 ÷ 2 = 4 961 + 0;
- 4 961 ÷ 2 = 2 480 + 1;
- 2 480 ÷ 2 = 1 240 + 0;
- 1 240 ÷ 2 = 620 + 0;
- 620 ÷ 2 = 310 + 0;
- 310 ÷ 2 = 155 + 0;
- 155 ÷ 2 = 77 + 1;
- 77 ÷ 2 = 38 + 1;
- 38 ÷ 2 = 19 + 0;
- 19 ÷ 2 = 9 + 1;
- 9 ÷ 2 = 4 + 1;
- 4 ÷ 2 = 2 + 0;
- 2 ÷ 2 = 1 + 0;
- 1 ÷ 2 = 0 + 1;
3. Construct the base 2 representation of the positive number:
Take all the remainders starting from the bottom of the list constructed above.
5 202 307 033(10) = 1 0011 0110 0001 0100 1110 0111 1101 1001(2)
4. Determine the signed binary number bit length:
The base 2 number's actual length, in bits: 33.
- 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, 33,
3) so that the first bit (leftmost) could be zero
(we deal with a positive number at this moment)
=== is: 64.
5. 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:
5 202 307 033(10) = 0000 0000 0000 0000 0000 0000 0000 0001 0011 0110 0001 0100 1110 0111 1101 1001
6. Get the negative integer number representation:
To get the negative integer number representation on 64 bits (8 Bytes),
... change the first bit (the leftmost), from 0 to 1...
-5 202 307 033(10) Base 10 integer number converted and written as a signed binary code (in base 2):
-5 202 307 033(10) = 1000 0000 0000 0000 0000 0000 0000 0001 0011 0110 0001 0100 1110 0111 1101 1001
Spaces were used to group digits: for binary, by 4, for decimal, by 3.