What are the required steps to convert base 10 integer
number 3 343 660 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;
- 3 343 660 ÷ 2 = 1 671 830 + 0;
- 1 671 830 ÷ 2 = 835 915 + 0;
- 835 915 ÷ 2 = 417 957 + 1;
- 417 957 ÷ 2 = 208 978 + 1;
- 208 978 ÷ 2 = 104 489 + 0;
- 104 489 ÷ 2 = 52 244 + 1;
- 52 244 ÷ 2 = 26 122 + 0;
- 26 122 ÷ 2 = 13 061 + 0;
- 13 061 ÷ 2 = 6 530 + 1;
- 6 530 ÷ 2 = 3 265 + 0;
- 3 265 ÷ 2 = 1 632 + 1;
- 1 632 ÷ 2 = 816 + 0;
- 816 ÷ 2 = 408 + 0;
- 408 ÷ 2 = 204 + 0;
- 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.
3 343 660(10) = 11 0011 0000 0101 0010 1100(2)
3. Determine the signed binary number bit length:
The base 2 number's actual length, in bits: 22.
- 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, 22,
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:
3 343 660(10) Base 10 integer number converted and written as a signed binary code (in base 2):
3 343 660(10) = 0000 0000 0011 0011 0000 0101 0010 1100
Spaces were used to group digits: for binary, by 4, for decimal, by 3.