What are the required steps to convert base 10 integer
number 3 031 726 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;
- 3 031 726 ÷ 2 = 1 515 863 + 0;
- 1 515 863 ÷ 2 = 757 931 + 1;
- 757 931 ÷ 2 = 378 965 + 1;
- 378 965 ÷ 2 = 189 482 + 1;
- 189 482 ÷ 2 = 94 741 + 0;
- 94 741 ÷ 2 = 47 370 + 1;
- 47 370 ÷ 2 = 23 685 + 0;
- 23 685 ÷ 2 = 11 842 + 1;
- 11 842 ÷ 2 = 5 921 + 0;
- 5 921 ÷ 2 = 2 960 + 1;
- 2 960 ÷ 2 = 1 480 + 0;
- 1 480 ÷ 2 = 740 + 0;
- 740 ÷ 2 = 370 + 0;
- 370 ÷ 2 = 185 + 0;
- 185 ÷ 2 = 92 + 1;
- 92 ÷ 2 = 46 + 0;
- 46 ÷ 2 = 23 + 0;
- 23 ÷ 2 = 11 + 1;
- 11 ÷ 2 = 5 + 1;
- 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.
3 031 726(10) = 10 1110 0100 0010 1010 1110(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:
3 031 726(10) Base 10 integer number converted and written as a signed binary code (in base 2):
3 031 726(10) = 0000 0000 0010 1110 0100 0010 1010 1110
Spaces were used to group digits: for binary, by 4, for decimal, by 3.