What are the required steps to convert base 10 integer
number 7 333 636 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;
- 7 333 636 ÷ 2 = 3 666 818 + 0;
- 3 666 818 ÷ 2 = 1 833 409 + 0;
- 1 833 409 ÷ 2 = 916 704 + 1;
- 916 704 ÷ 2 = 458 352 + 0;
- 458 352 ÷ 2 = 229 176 + 0;
- 229 176 ÷ 2 = 114 588 + 0;
- 114 588 ÷ 2 = 57 294 + 0;
- 57 294 ÷ 2 = 28 647 + 0;
- 28 647 ÷ 2 = 14 323 + 1;
- 14 323 ÷ 2 = 7 161 + 1;
- 7 161 ÷ 2 = 3 580 + 1;
- 3 580 ÷ 2 = 1 790 + 0;
- 1 790 ÷ 2 = 895 + 0;
- 895 ÷ 2 = 447 + 1;
- 447 ÷ 2 = 223 + 1;
- 223 ÷ 2 = 111 + 1;
- 111 ÷ 2 = 55 + 1;
- 55 ÷ 2 = 27 + 1;
- 27 ÷ 2 = 13 + 1;
- 13 ÷ 2 = 6 + 1;
- 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.
7 333 636(10) = 110 1111 1110 0111 0000 0100(2)
3. Determine the signed binary number bit length:
The base 2 number's actual length, in bits: 23.
- 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, 23,
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:
7 333 636(10) Base 10 integer number converted and written as a signed binary code (in base 2):
7 333 636(10) = 0000 0000 0110 1111 1110 0111 0000 0100
Spaces were used to group digits: for binary, by 4, for decimal, by 3.