What are the required steps to convert base 10 integer
number 232 643 483 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;
- 232 643 483 ÷ 2 = 116 321 741 + 1;
- 116 321 741 ÷ 2 = 58 160 870 + 1;
- 58 160 870 ÷ 2 = 29 080 435 + 0;
- 29 080 435 ÷ 2 = 14 540 217 + 1;
- 14 540 217 ÷ 2 = 7 270 108 + 1;
- 7 270 108 ÷ 2 = 3 635 054 + 0;
- 3 635 054 ÷ 2 = 1 817 527 + 0;
- 1 817 527 ÷ 2 = 908 763 + 1;
- 908 763 ÷ 2 = 454 381 + 1;
- 454 381 ÷ 2 = 227 190 + 1;
- 227 190 ÷ 2 = 113 595 + 0;
- 113 595 ÷ 2 = 56 797 + 1;
- 56 797 ÷ 2 = 28 398 + 1;
- 28 398 ÷ 2 = 14 199 + 0;
- 14 199 ÷ 2 = 7 099 + 1;
- 7 099 ÷ 2 = 3 549 + 1;
- 3 549 ÷ 2 = 1 774 + 1;
- 1 774 ÷ 2 = 887 + 0;
- 887 ÷ 2 = 443 + 1;
- 443 ÷ 2 = 221 + 1;
- 221 ÷ 2 = 110 + 1;
- 110 ÷ 2 = 55 + 0;
- 55 ÷ 2 = 27 + 1;
- 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.
232 643 483(10) = 1101 1101 1101 1101 1011 1001 1011(2)
3. Determine the signed binary number bit length:
The base 2 number's actual length, in bits: 28.
- 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, 28,
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:
232 643 483(10) Base 10 integer number converted and written as a signed binary code (in base 2):
232 643 483(10) = 0000 1101 1101 1101 1101 1011 1001 1011
Spaces were used to group digits: for binary, by 4, for decimal, by 3.