What are the required steps to convert base 10 integer
number 1 086 325 093 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;
- 1 086 325 093 ÷ 2 = 543 162 546 + 1;
- 543 162 546 ÷ 2 = 271 581 273 + 0;
- 271 581 273 ÷ 2 = 135 790 636 + 1;
- 135 790 636 ÷ 2 = 67 895 318 + 0;
- 67 895 318 ÷ 2 = 33 947 659 + 0;
- 33 947 659 ÷ 2 = 16 973 829 + 1;
- 16 973 829 ÷ 2 = 8 486 914 + 1;
- 8 486 914 ÷ 2 = 4 243 457 + 0;
- 4 243 457 ÷ 2 = 2 121 728 + 1;
- 2 121 728 ÷ 2 = 1 060 864 + 0;
- 1 060 864 ÷ 2 = 530 432 + 0;
- 530 432 ÷ 2 = 265 216 + 0;
- 265 216 ÷ 2 = 132 608 + 0;
- 132 608 ÷ 2 = 66 304 + 0;
- 66 304 ÷ 2 = 33 152 + 0;
- 33 152 ÷ 2 = 16 576 + 0;
- 16 576 ÷ 2 = 8 288 + 0;
- 8 288 ÷ 2 = 4 144 + 0;
- 4 144 ÷ 2 = 2 072 + 0;
- 2 072 ÷ 2 = 1 036 + 0;
- 1 036 ÷ 2 = 518 + 0;
- 518 ÷ 2 = 259 + 0;
- 259 ÷ 2 = 129 + 1;
- 129 ÷ 2 = 64 + 1;
- 64 ÷ 2 = 32 + 0;
- 32 ÷ 2 = 16 + 0;
- 16 ÷ 2 = 8 + 0;
- 8 ÷ 2 = 4 + 0;
- 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.
1 086 325 093(10) = 100 0000 1100 0000 0000 0001 0110 0101(2)
3. Determine the signed binary number bit length:
The base 2 number's actual length, in bits: 31.
- 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, 31,
3) so that the first bit (leftmost) could be zero
(we deal with a positive number at this moment)
=== is: 32.
4. Get the positive binary computer representation on 32 bits (4 Bytes):
If needed, add extra 0s in front (to the left) of the base 2 number, up to the required length, 32:
1 086 325 093(10) Base 10 integer number converted and written as a signed binary code (in base 2):
1 086 325 093(10) = 0100 0000 1100 0000 0000 0001 0110 0101
Spaces were used to group digits: for binary, by 4, for decimal, by 3.