What are the required steps to convert base 10 integer
number 10 100 000 099 175 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;
- 10 100 000 099 175 ÷ 2 = 5 050 000 049 587 + 1;
- 5 050 000 049 587 ÷ 2 = 2 525 000 024 793 + 1;
- 2 525 000 024 793 ÷ 2 = 1 262 500 012 396 + 1;
- 1 262 500 012 396 ÷ 2 = 631 250 006 198 + 0;
- 631 250 006 198 ÷ 2 = 315 625 003 099 + 0;
- 315 625 003 099 ÷ 2 = 157 812 501 549 + 1;
- 157 812 501 549 ÷ 2 = 78 906 250 774 + 1;
- 78 906 250 774 ÷ 2 = 39 453 125 387 + 0;
- 39 453 125 387 ÷ 2 = 19 726 562 693 + 1;
- 19 726 562 693 ÷ 2 = 9 863 281 346 + 1;
- 9 863 281 346 ÷ 2 = 4 931 640 673 + 0;
- 4 931 640 673 ÷ 2 = 2 465 820 336 + 1;
- 2 465 820 336 ÷ 2 = 1 232 910 168 + 0;
- 1 232 910 168 ÷ 2 = 616 455 084 + 0;
- 616 455 084 ÷ 2 = 308 227 542 + 0;
- 308 227 542 ÷ 2 = 154 113 771 + 0;
- 154 113 771 ÷ 2 = 77 056 885 + 1;
- 77 056 885 ÷ 2 = 38 528 442 + 1;
- 38 528 442 ÷ 2 = 19 264 221 + 0;
- 19 264 221 ÷ 2 = 9 632 110 + 1;
- 9 632 110 ÷ 2 = 4 816 055 + 0;
- 4 816 055 ÷ 2 = 2 408 027 + 1;
- 2 408 027 ÷ 2 = 1 204 013 + 1;
- 1 204 013 ÷ 2 = 602 006 + 1;
- 602 006 ÷ 2 = 301 003 + 0;
- 301 003 ÷ 2 = 150 501 + 1;
- 150 501 ÷ 2 = 75 250 + 1;
- 75 250 ÷ 2 = 37 625 + 0;
- 37 625 ÷ 2 = 18 812 + 1;
- 18 812 ÷ 2 = 9 406 + 0;
- 9 406 ÷ 2 = 4 703 + 0;
- 4 703 ÷ 2 = 2 351 + 1;
- 2 351 ÷ 2 = 1 175 + 1;
- 1 175 ÷ 2 = 587 + 1;
- 587 ÷ 2 = 293 + 1;
- 293 ÷ 2 = 146 + 1;
- 146 ÷ 2 = 73 + 0;
- 73 ÷ 2 = 36 + 1;
- 36 ÷ 2 = 18 + 0;
- 18 ÷ 2 = 9 + 0;
- 9 ÷ 2 = 4 + 1;
- 4 ÷ 2 = 2 + 0;
- 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.
10 100 000 099 175(10) = 1001 0010 1111 1001 0110 1110 1011 0000 1011 0110 0111(2)
3. Determine the signed binary number bit length:
The base 2 number's actual length, in bits: 44.
- 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, 44,
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:
10 100 000 099 175(10) Base 10 integer number converted and written as a signed binary code (in base 2):
10 100 000 099 175(10) = 0000 0000 0000 0000 0000 1001 0010 1111 1001 0110 1110 1011 0000 1011 0110 0111
Spaces were used to group digits: for binary, by 4, for decimal, by 3.