What are the required steps to convert base 10 integer
number 2 023 407 636 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;
- 2 023 407 636 ÷ 2 = 1 011 703 818 + 0;
- 1 011 703 818 ÷ 2 = 505 851 909 + 0;
- 505 851 909 ÷ 2 = 252 925 954 + 1;
- 252 925 954 ÷ 2 = 126 462 977 + 0;
- 126 462 977 ÷ 2 = 63 231 488 + 1;
- 63 231 488 ÷ 2 = 31 615 744 + 0;
- 31 615 744 ÷ 2 = 15 807 872 + 0;
- 15 807 872 ÷ 2 = 7 903 936 + 0;
- 7 903 936 ÷ 2 = 3 951 968 + 0;
- 3 951 968 ÷ 2 = 1 975 984 + 0;
- 1 975 984 ÷ 2 = 987 992 + 0;
- 987 992 ÷ 2 = 493 996 + 0;
- 493 996 ÷ 2 = 246 998 + 0;
- 246 998 ÷ 2 = 123 499 + 0;
- 123 499 ÷ 2 = 61 749 + 1;
- 61 749 ÷ 2 = 30 874 + 1;
- 30 874 ÷ 2 = 15 437 + 0;
- 15 437 ÷ 2 = 7 718 + 1;
- 7 718 ÷ 2 = 3 859 + 0;
- 3 859 ÷ 2 = 1 929 + 1;
- 1 929 ÷ 2 = 964 + 1;
- 964 ÷ 2 = 482 + 0;
- 482 ÷ 2 = 241 + 0;
- 241 ÷ 2 = 120 + 1;
- 120 ÷ 2 = 60 + 0;
- 60 ÷ 2 = 30 + 0;
- 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.
2 023 407 636(10) = 111 1000 1001 1010 1100 0000 0001 0100(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:
2 023 407 636(10) Base 10 integer number converted and written as a signed binary code (in base 2):
2 023 407 636(10) = 0111 1000 1001 1010 1100 0000 0001 0100
Spaces were used to group digits: for binary, by 4, for decimal, by 3.