What are the required steps to convert base 10 integer
number 110 010 101 176 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;
- 110 010 101 176 ÷ 2 = 55 005 050 588 + 0;
- 55 005 050 588 ÷ 2 = 27 502 525 294 + 0;
- 27 502 525 294 ÷ 2 = 13 751 262 647 + 0;
- 13 751 262 647 ÷ 2 = 6 875 631 323 + 1;
- 6 875 631 323 ÷ 2 = 3 437 815 661 + 1;
- 3 437 815 661 ÷ 2 = 1 718 907 830 + 1;
- 1 718 907 830 ÷ 2 = 859 453 915 + 0;
- 859 453 915 ÷ 2 = 429 726 957 + 1;
- 429 726 957 ÷ 2 = 214 863 478 + 1;
- 214 863 478 ÷ 2 = 107 431 739 + 0;
- 107 431 739 ÷ 2 = 53 715 869 + 1;
- 53 715 869 ÷ 2 = 26 857 934 + 1;
- 26 857 934 ÷ 2 = 13 428 967 + 0;
- 13 428 967 ÷ 2 = 6 714 483 + 1;
- 6 714 483 ÷ 2 = 3 357 241 + 1;
- 3 357 241 ÷ 2 = 1 678 620 + 1;
- 1 678 620 ÷ 2 = 839 310 + 0;
- 839 310 ÷ 2 = 419 655 + 0;
- 419 655 ÷ 2 = 209 827 + 1;
- 209 827 ÷ 2 = 104 913 + 1;
- 104 913 ÷ 2 = 52 456 + 1;
- 52 456 ÷ 2 = 26 228 + 0;
- 26 228 ÷ 2 = 13 114 + 0;
- 13 114 ÷ 2 = 6 557 + 0;
- 6 557 ÷ 2 = 3 278 + 1;
- 3 278 ÷ 2 = 1 639 + 0;
- 1 639 ÷ 2 = 819 + 1;
- 819 ÷ 2 = 409 + 1;
- 409 ÷ 2 = 204 + 1;
- 204 ÷ 2 = 102 + 0;
- 102 ÷ 2 = 51 + 0;
- 51 ÷ 2 = 25 + 1;
- 25 ÷ 2 = 12 + 1;
- 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.
110 010 101 176(10) = 1 1001 1001 1101 0001 1100 1110 1101 1011 1000(2)
3. Determine the signed binary number bit length:
The base 2 number's actual length, in bits: 37.
- 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, 37,
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:
110 010 101 176(10) Base 10 integer number converted and written as a signed binary code (in base 2):
110 010 101 176(10) = 0000 0000 0000 0000 0000 0000 0001 1001 1001 1101 0001 1100 1110 1101 1011 1000
Spaces were used to group digits: for binary, by 4, for decimal, by 3.