What are the required steps to convert base 10 integer
number 1 323 784 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;
- 1 323 784 ÷ 2 = 661 892 + 0;
- 661 892 ÷ 2 = 330 946 + 0;
- 330 946 ÷ 2 = 165 473 + 0;
- 165 473 ÷ 2 = 82 736 + 1;
- 82 736 ÷ 2 = 41 368 + 0;
- 41 368 ÷ 2 = 20 684 + 0;
- 20 684 ÷ 2 = 10 342 + 0;
- 10 342 ÷ 2 = 5 171 + 0;
- 5 171 ÷ 2 = 2 585 + 1;
- 2 585 ÷ 2 = 1 292 + 1;
- 1 292 ÷ 2 = 646 + 0;
- 646 ÷ 2 = 323 + 0;
- 323 ÷ 2 = 161 + 1;
- 161 ÷ 2 = 80 + 1;
- 80 ÷ 2 = 40 + 0;
- 40 ÷ 2 = 20 + 0;
- 20 ÷ 2 = 10 + 0;
- 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.
1 323 784(10) = 1 0100 0011 0011 0000 1000(2)
3. Determine the signed binary number bit length:
The base 2 number's actual length, in bits: 21.
- 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, 21,
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:
1 323 784(10) Base 10 integer number converted and written as a signed binary code (in base 2):
1 323 784(10) = 0000 0000 0001 0100 0011 0011 0000 1000
Spaces were used to group digits: for binary, by 4, for decimal, by 3.