What are the required steps to convert base 10 integer
number 4 286 998 098 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;
- 4 286 998 098 ÷ 2 = 2 143 499 049 + 0;
- 2 143 499 049 ÷ 2 = 1 071 749 524 + 1;
- 1 071 749 524 ÷ 2 = 535 874 762 + 0;
- 535 874 762 ÷ 2 = 267 937 381 + 0;
- 267 937 381 ÷ 2 = 133 968 690 + 1;
- 133 968 690 ÷ 2 = 66 984 345 + 0;
- 66 984 345 ÷ 2 = 33 492 172 + 1;
- 33 492 172 ÷ 2 = 16 746 086 + 0;
- 16 746 086 ÷ 2 = 8 373 043 + 0;
- 8 373 043 ÷ 2 = 4 186 521 + 1;
- 4 186 521 ÷ 2 = 2 093 260 + 1;
- 2 093 260 ÷ 2 = 1 046 630 + 0;
- 1 046 630 ÷ 2 = 523 315 + 0;
- 523 315 ÷ 2 = 261 657 + 1;
- 261 657 ÷ 2 = 130 828 + 1;
- 130 828 ÷ 2 = 65 414 + 0;
- 65 414 ÷ 2 = 32 707 + 0;
- 32 707 ÷ 2 = 16 353 + 1;
- 16 353 ÷ 2 = 8 176 + 1;
- 8 176 ÷ 2 = 4 088 + 0;
- 4 088 ÷ 2 = 2 044 + 0;
- 2 044 ÷ 2 = 1 022 + 0;
- 1 022 ÷ 2 = 511 + 0;
- 511 ÷ 2 = 255 + 1;
- 255 ÷ 2 = 127 + 1;
- 127 ÷ 2 = 63 + 1;
- 63 ÷ 2 = 31 + 1;
- 31 ÷ 2 = 15 + 1;
- 15 ÷ 2 = 7 + 1;
- 7 ÷ 2 = 3 + 1;
- 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.
4 286 998 098(10) = 1111 1111 1000 0110 0110 0110 0101 0010(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:
4 286 998 098(10) Base 10 integer number converted and written as a signed binary code (in base 2):
4 286 998 098(10) = 0000 0000 0000 0000 0000 0000 0000 0000 1111 1111 1000 0110 0110 0110 0101 0010
Spaces were used to group digits: for binary, by 4, for decimal, by 3.