What are the required steps to convert base 10 integer
number 2 063 879 958 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;
- 2 063 879 958 ÷ 2 = 1 031 939 979 + 0;
- 1 031 939 979 ÷ 2 = 515 969 989 + 1;
- 515 969 989 ÷ 2 = 257 984 994 + 1;
- 257 984 994 ÷ 2 = 128 992 497 + 0;
- 128 992 497 ÷ 2 = 64 496 248 + 1;
- 64 496 248 ÷ 2 = 32 248 124 + 0;
- 32 248 124 ÷ 2 = 16 124 062 + 0;
- 16 124 062 ÷ 2 = 8 062 031 + 0;
- 8 062 031 ÷ 2 = 4 031 015 + 1;
- 4 031 015 ÷ 2 = 2 015 507 + 1;
- 2 015 507 ÷ 2 = 1 007 753 + 1;
- 1 007 753 ÷ 2 = 503 876 + 1;
- 503 876 ÷ 2 = 251 938 + 0;
- 251 938 ÷ 2 = 125 969 + 0;
- 125 969 ÷ 2 = 62 984 + 1;
- 62 984 ÷ 2 = 31 492 + 0;
- 31 492 ÷ 2 = 15 746 + 0;
- 15 746 ÷ 2 = 7 873 + 0;
- 7 873 ÷ 2 = 3 936 + 1;
- 3 936 ÷ 2 = 1 968 + 0;
- 1 968 ÷ 2 = 984 + 0;
- 984 ÷ 2 = 492 + 0;
- 492 ÷ 2 = 246 + 0;
- 246 ÷ 2 = 123 + 0;
- 123 ÷ 2 = 61 + 1;
- 61 ÷ 2 = 30 + 1;
- 30 ÷ 2 = 15 + 0;
- 15 ÷ 2 = 7 + 1;
- 7 ÷ 2 = 3 + 1;
- 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.
2 063 879 958(10) = 111 1011 0000 0100 0100 1111 0001 0110(2)
3. Determine the signed binary number bit length:
The base 2 number's actual length, in bits: 31.
- 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, 31,
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:
2 063 879 958(10) Base 10 integer number converted and written as a signed binary code (in base 2):
2 063 879 958(10) = 0111 1011 0000 0100 0100 1111 0001 0110
Spaces were used to group digits: for binary, by 4, for decimal, by 3.