What are the required steps to convert base 10 integer
number 89 093 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;
- 89 093 ÷ 2 = 44 546 + 1;
- 44 546 ÷ 2 = 22 273 + 0;
- 22 273 ÷ 2 = 11 136 + 1;
- 11 136 ÷ 2 = 5 568 + 0;
- 5 568 ÷ 2 = 2 784 + 0;
- 2 784 ÷ 2 = 1 392 + 0;
- 1 392 ÷ 2 = 696 + 0;
- 696 ÷ 2 = 348 + 0;
- 348 ÷ 2 = 174 + 0;
- 174 ÷ 2 = 87 + 0;
- 87 ÷ 2 = 43 + 1;
- 43 ÷ 2 = 21 + 1;
- 21 ÷ 2 = 10 + 1;
- 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.
89 093(10) = 1 0101 1100 0000 0101(2)
3. Determine the signed binary number bit length:
The base 2 number's actual length, in bits: 17.
- 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, 17,
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:
89 093(10) Base 10 integer number converted and written as a signed binary code (in base 2):
89 093(10) = 0000 0000 0000 0001 0101 1100 0000 0101
Spaces were used to group digits: for binary, by 4, for decimal, by 3.