What are the required steps to convert base 10 integer
number 263 927 000 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;
- 263 927 000 ÷ 2 = 131 963 500 + 0;
- 131 963 500 ÷ 2 = 65 981 750 + 0;
- 65 981 750 ÷ 2 = 32 990 875 + 0;
- 32 990 875 ÷ 2 = 16 495 437 + 1;
- 16 495 437 ÷ 2 = 8 247 718 + 1;
- 8 247 718 ÷ 2 = 4 123 859 + 0;
- 4 123 859 ÷ 2 = 2 061 929 + 1;
- 2 061 929 ÷ 2 = 1 030 964 + 1;
- 1 030 964 ÷ 2 = 515 482 + 0;
- 515 482 ÷ 2 = 257 741 + 0;
- 257 741 ÷ 2 = 128 870 + 1;
- 128 870 ÷ 2 = 64 435 + 0;
- 64 435 ÷ 2 = 32 217 + 1;
- 32 217 ÷ 2 = 16 108 + 1;
- 16 108 ÷ 2 = 8 054 + 0;
- 8 054 ÷ 2 = 4 027 + 0;
- 4 027 ÷ 2 = 2 013 + 1;
- 2 013 ÷ 2 = 1 006 + 1;
- 1 006 ÷ 2 = 503 + 0;
- 503 ÷ 2 = 251 + 1;
- 251 ÷ 2 = 125 + 1;
- 125 ÷ 2 = 62 + 1;
- 62 ÷ 2 = 31 + 0;
- 31 ÷ 2 = 15 + 1;
- 15 ÷ 2 = 7 + 1;
- 7 ÷ 2 = 3 + 1;
- 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.
263 927 000(10) = 1111 1011 1011 0011 0100 1101 1000(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:
263 927 000(10) Base 10 integer number converted and written as a signed binary code (in base 2):
263 927 000(10) = 0000 1111 1011 1011 0011 0100 1101 1000
Spaces were used to group digits: for binary, by 4, for decimal, by 3.