What are the required steps to convert base 10 integer
number 7 022 322 333 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;
- 7 022 322 333 ÷ 2 = 3 511 161 166 + 1;
- 3 511 161 166 ÷ 2 = 1 755 580 583 + 0;
- 1 755 580 583 ÷ 2 = 877 790 291 + 1;
- 877 790 291 ÷ 2 = 438 895 145 + 1;
- 438 895 145 ÷ 2 = 219 447 572 + 1;
- 219 447 572 ÷ 2 = 109 723 786 + 0;
- 109 723 786 ÷ 2 = 54 861 893 + 0;
- 54 861 893 ÷ 2 = 27 430 946 + 1;
- 27 430 946 ÷ 2 = 13 715 473 + 0;
- 13 715 473 ÷ 2 = 6 857 736 + 1;
- 6 857 736 ÷ 2 = 3 428 868 + 0;
- 3 428 868 ÷ 2 = 1 714 434 + 0;
- 1 714 434 ÷ 2 = 857 217 + 0;
- 857 217 ÷ 2 = 428 608 + 1;
- 428 608 ÷ 2 = 214 304 + 0;
- 214 304 ÷ 2 = 107 152 + 0;
- 107 152 ÷ 2 = 53 576 + 0;
- 53 576 ÷ 2 = 26 788 + 0;
- 26 788 ÷ 2 = 13 394 + 0;
- 13 394 ÷ 2 = 6 697 + 0;
- 6 697 ÷ 2 = 3 348 + 1;
- 3 348 ÷ 2 = 1 674 + 0;
- 1 674 ÷ 2 = 837 + 0;
- 837 ÷ 2 = 418 + 1;
- 418 ÷ 2 = 209 + 0;
- 209 ÷ 2 = 104 + 1;
- 104 ÷ 2 = 52 + 0;
- 52 ÷ 2 = 26 + 0;
- 26 ÷ 2 = 13 + 0;
- 13 ÷ 2 = 6 + 1;
- 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.
7 022 322 333(10) = 1 1010 0010 1001 0000 0010 0010 1001 1101(2)
3. 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.
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:
7 022 322 333(10) Base 10 integer number converted and written as a signed binary code (in base 2):
7 022 322 333(10) = 0000 0000 0000 0000 0000 0000 0000 0001 1010 0010 1001 0000 0010 0010 1001 1101
Spaces were used to group digits: for binary, by 4, for decimal, by 3.