What are the required steps to convert base 10 integer
number 598 641 670 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;
- 598 641 670 ÷ 2 = 299 320 835 + 0;
- 299 320 835 ÷ 2 = 149 660 417 + 1;
- 149 660 417 ÷ 2 = 74 830 208 + 1;
- 74 830 208 ÷ 2 = 37 415 104 + 0;
- 37 415 104 ÷ 2 = 18 707 552 + 0;
- 18 707 552 ÷ 2 = 9 353 776 + 0;
- 9 353 776 ÷ 2 = 4 676 888 + 0;
- 4 676 888 ÷ 2 = 2 338 444 + 0;
- 2 338 444 ÷ 2 = 1 169 222 + 0;
- 1 169 222 ÷ 2 = 584 611 + 0;
- 584 611 ÷ 2 = 292 305 + 1;
- 292 305 ÷ 2 = 146 152 + 1;
- 146 152 ÷ 2 = 73 076 + 0;
- 73 076 ÷ 2 = 36 538 + 0;
- 36 538 ÷ 2 = 18 269 + 0;
- 18 269 ÷ 2 = 9 134 + 1;
- 9 134 ÷ 2 = 4 567 + 0;
- 4 567 ÷ 2 = 2 283 + 1;
- 2 283 ÷ 2 = 1 141 + 1;
- 1 141 ÷ 2 = 570 + 1;
- 570 ÷ 2 = 285 + 0;
- 285 ÷ 2 = 142 + 1;
- 142 ÷ 2 = 71 + 0;
- 71 ÷ 2 = 35 + 1;
- 35 ÷ 2 = 17 + 1;
- 17 ÷ 2 = 8 + 1;
- 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.
598 641 670(10) = 10 0011 1010 1110 1000 1100 0000 0110(2)
3. Determine the signed binary number bit length:
The base 2 number's actual length, in bits: 30.
- 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, 30,
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:
598 641 670(10) Base 10 integer number converted and written as a signed binary code (in base 2):
598 641 670(10) = 0010 0011 1010 1110 1000 1100 0000 0110
Spaces were used to group digits: for binary, by 4, for decimal, by 3.