What are the required steps to convert base 10 integer
number 456 337 264 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;
- 456 337 264 ÷ 2 = 228 168 632 + 0;
- 228 168 632 ÷ 2 = 114 084 316 + 0;
- 114 084 316 ÷ 2 = 57 042 158 + 0;
- 57 042 158 ÷ 2 = 28 521 079 + 0;
- 28 521 079 ÷ 2 = 14 260 539 + 1;
- 14 260 539 ÷ 2 = 7 130 269 + 1;
- 7 130 269 ÷ 2 = 3 565 134 + 1;
- 3 565 134 ÷ 2 = 1 782 567 + 0;
- 1 782 567 ÷ 2 = 891 283 + 1;
- 891 283 ÷ 2 = 445 641 + 1;
- 445 641 ÷ 2 = 222 820 + 1;
- 222 820 ÷ 2 = 111 410 + 0;
- 111 410 ÷ 2 = 55 705 + 0;
- 55 705 ÷ 2 = 27 852 + 1;
- 27 852 ÷ 2 = 13 926 + 0;
- 13 926 ÷ 2 = 6 963 + 0;
- 6 963 ÷ 2 = 3 481 + 1;
- 3 481 ÷ 2 = 1 740 + 1;
- 1 740 ÷ 2 = 870 + 0;
- 870 ÷ 2 = 435 + 0;
- 435 ÷ 2 = 217 + 1;
- 217 ÷ 2 = 108 + 1;
- 108 ÷ 2 = 54 + 0;
- 54 ÷ 2 = 27 + 0;
- 27 ÷ 2 = 13 + 1;
- 13 ÷ 2 = 6 + 1;
- 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.
456 337 264(10) = 1 1011 0011 0011 0010 0111 0111 0000(2)
3. Determine the signed binary number bit length:
The base 2 number's actual length, in bits: 29.
- 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, 29,
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:
456 337 264(10) Base 10 integer number converted and written as a signed binary code (in base 2):
456 337 264(10) = 0001 1011 0011 0011 0010 0111 0111 0000
Spaces were used to group digits: for binary, by 4, for decimal, by 3.