What are the required steps to convert base 10 integer
number 3 610 121 932 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;
- 3 610 121 932 ÷ 2 = 1 805 060 966 + 0;
- 1 805 060 966 ÷ 2 = 902 530 483 + 0;
- 902 530 483 ÷ 2 = 451 265 241 + 1;
- 451 265 241 ÷ 2 = 225 632 620 + 1;
- 225 632 620 ÷ 2 = 112 816 310 + 0;
- 112 816 310 ÷ 2 = 56 408 155 + 0;
- 56 408 155 ÷ 2 = 28 204 077 + 1;
- 28 204 077 ÷ 2 = 14 102 038 + 1;
- 14 102 038 ÷ 2 = 7 051 019 + 0;
- 7 051 019 ÷ 2 = 3 525 509 + 1;
- 3 525 509 ÷ 2 = 1 762 754 + 1;
- 1 762 754 ÷ 2 = 881 377 + 0;
- 881 377 ÷ 2 = 440 688 + 1;
- 440 688 ÷ 2 = 220 344 + 0;
- 220 344 ÷ 2 = 110 172 + 0;
- 110 172 ÷ 2 = 55 086 + 0;
- 55 086 ÷ 2 = 27 543 + 0;
- 27 543 ÷ 2 = 13 771 + 1;
- 13 771 ÷ 2 = 6 885 + 1;
- 6 885 ÷ 2 = 3 442 + 1;
- 3 442 ÷ 2 = 1 721 + 0;
- 1 721 ÷ 2 = 860 + 1;
- 860 ÷ 2 = 430 + 0;
- 430 ÷ 2 = 215 + 0;
- 215 ÷ 2 = 107 + 1;
- 107 ÷ 2 = 53 + 1;
- 53 ÷ 2 = 26 + 1;
- 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.
3 610 121 932(10) = 1101 0111 0010 1110 0001 0110 1100 1100(2)
3. Determine the signed binary number bit length:
The base 2 number's actual length, in bits: 32.
- 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, 32,
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:
3 610 121 932(10) Base 10 integer number converted and written as a signed binary code (in base 2):
3 610 121 932(10) = 0000 0000 0000 0000 0000 0000 0000 0000 1101 0111 0010 1110 0001 0110 1100 1100
Spaces were used to group digits: for binary, by 4, for decimal, by 3.