What are the required steps to convert base 10 integer
number 224 299 376 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;
- 224 299 376 ÷ 2 = 112 149 688 + 0;
- 112 149 688 ÷ 2 = 56 074 844 + 0;
- 56 074 844 ÷ 2 = 28 037 422 + 0;
- 28 037 422 ÷ 2 = 14 018 711 + 0;
- 14 018 711 ÷ 2 = 7 009 355 + 1;
- 7 009 355 ÷ 2 = 3 504 677 + 1;
- 3 504 677 ÷ 2 = 1 752 338 + 1;
- 1 752 338 ÷ 2 = 876 169 + 0;
- 876 169 ÷ 2 = 438 084 + 1;
- 438 084 ÷ 2 = 219 042 + 0;
- 219 042 ÷ 2 = 109 521 + 0;
- 109 521 ÷ 2 = 54 760 + 1;
- 54 760 ÷ 2 = 27 380 + 0;
- 27 380 ÷ 2 = 13 690 + 0;
- 13 690 ÷ 2 = 6 845 + 0;
- 6 845 ÷ 2 = 3 422 + 1;
- 3 422 ÷ 2 = 1 711 + 0;
- 1 711 ÷ 2 = 855 + 1;
- 855 ÷ 2 = 427 + 1;
- 427 ÷ 2 = 213 + 1;
- 213 ÷ 2 = 106 + 1;
- 106 ÷ 2 = 53 + 0;
- 53 ÷ 2 = 26 + 1;
- 26 ÷ 2 = 13 + 0;
- 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.
224 299 376(10) = 1101 0101 1110 1000 1001 0111 0000(2)
3. Determine the signed binary number bit length:
The base 2 number's actual length, in bits: 28.
- 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, 28,
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:
224 299 376(10) Base 10 integer number converted and written as a signed binary code (in base 2):
224 299 376(10) = 0000 1101 0101 1110 1000 1001 0111 0000
Spaces were used to group digits: for binary, by 4, for decimal, by 3.