What are the required steps to convert base 10 integer
number 10 950 512 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;
- 10 950 512 ÷ 2 = 5 475 256 + 0;
- 5 475 256 ÷ 2 = 2 737 628 + 0;
- 2 737 628 ÷ 2 = 1 368 814 + 0;
- 1 368 814 ÷ 2 = 684 407 + 0;
- 684 407 ÷ 2 = 342 203 + 1;
- 342 203 ÷ 2 = 171 101 + 1;
- 171 101 ÷ 2 = 85 550 + 1;
- 85 550 ÷ 2 = 42 775 + 0;
- 42 775 ÷ 2 = 21 387 + 1;
- 21 387 ÷ 2 = 10 693 + 1;
- 10 693 ÷ 2 = 5 346 + 1;
- 5 346 ÷ 2 = 2 673 + 0;
- 2 673 ÷ 2 = 1 336 + 1;
- 1 336 ÷ 2 = 668 + 0;
- 668 ÷ 2 = 334 + 0;
- 334 ÷ 2 = 167 + 0;
- 167 ÷ 2 = 83 + 1;
- 83 ÷ 2 = 41 + 1;
- 41 ÷ 2 = 20 + 1;
- 20 ÷ 2 = 10 + 0;
- 10 ÷ 2 = 5 + 0;
- 5 ÷ 2 = 2 + 1;
- 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.
10 950 512(10) = 1010 0111 0001 0111 0111 0000(2)
3. Determine the signed binary number bit length:
The base 2 number's actual length, in bits: 24.
- 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, 24,
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:
10 950 512(10) Base 10 integer number converted and written as a signed binary code (in base 2):
10 950 512(10) = 0000 0000 1010 0111 0001 0111 0111 0000
Spaces were used to group digits: for binary, by 4, for decimal, by 3.