What are the required steps to convert base 10 integer
number 3 300 606 209 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;
- 3 300 606 209 ÷ 2 = 1 650 303 104 + 1;
- 1 650 303 104 ÷ 2 = 825 151 552 + 0;
- 825 151 552 ÷ 2 = 412 575 776 + 0;
- 412 575 776 ÷ 2 = 206 287 888 + 0;
- 206 287 888 ÷ 2 = 103 143 944 + 0;
- 103 143 944 ÷ 2 = 51 571 972 + 0;
- 51 571 972 ÷ 2 = 25 785 986 + 0;
- 25 785 986 ÷ 2 = 12 892 993 + 0;
- 12 892 993 ÷ 2 = 6 446 496 + 1;
- 6 446 496 ÷ 2 = 3 223 248 + 0;
- 3 223 248 ÷ 2 = 1 611 624 + 0;
- 1 611 624 ÷ 2 = 805 812 + 0;
- 805 812 ÷ 2 = 402 906 + 0;
- 402 906 ÷ 2 = 201 453 + 0;
- 201 453 ÷ 2 = 100 726 + 1;
- 100 726 ÷ 2 = 50 363 + 0;
- 50 363 ÷ 2 = 25 181 + 1;
- 25 181 ÷ 2 = 12 590 + 1;
- 12 590 ÷ 2 = 6 295 + 0;
- 6 295 ÷ 2 = 3 147 + 1;
- 3 147 ÷ 2 = 1 573 + 1;
- 1 573 ÷ 2 = 786 + 1;
- 786 ÷ 2 = 393 + 0;
- 393 ÷ 2 = 196 + 1;
- 196 ÷ 2 = 98 + 0;
- 98 ÷ 2 = 49 + 0;
- 49 ÷ 2 = 24 + 1;
- 24 ÷ 2 = 12 + 0;
- 12 ÷ 2 = 6 + 0;
- 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.
3 300 606 209(10) = 1100 0100 1011 1011 0100 0001 0000 0001(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:
3 300 606 209(10) Base 10 integer number converted and written as a signed binary code (in base 2):
3 300 606 209(10) = 0000 0000 0000 0000 0000 0000 0000 0000 1100 0100 1011 1011 0100 0001 0000 0001
Spaces were used to group digits: for binary, by 4, for decimal, by 3.