What are the required steps to convert base 10 integer
number 1 011 010 952 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;
- 1 011 010 952 ÷ 2 = 505 505 476 + 0;
- 505 505 476 ÷ 2 = 252 752 738 + 0;
- 252 752 738 ÷ 2 = 126 376 369 + 0;
- 126 376 369 ÷ 2 = 63 188 184 + 1;
- 63 188 184 ÷ 2 = 31 594 092 + 0;
- 31 594 092 ÷ 2 = 15 797 046 + 0;
- 15 797 046 ÷ 2 = 7 898 523 + 0;
- 7 898 523 ÷ 2 = 3 949 261 + 1;
- 3 949 261 ÷ 2 = 1 974 630 + 1;
- 1 974 630 ÷ 2 = 987 315 + 0;
- 987 315 ÷ 2 = 493 657 + 1;
- 493 657 ÷ 2 = 246 828 + 1;
- 246 828 ÷ 2 = 123 414 + 0;
- 123 414 ÷ 2 = 61 707 + 0;
- 61 707 ÷ 2 = 30 853 + 1;
- 30 853 ÷ 2 = 15 426 + 1;
- 15 426 ÷ 2 = 7 713 + 0;
- 7 713 ÷ 2 = 3 856 + 1;
- 3 856 ÷ 2 = 1 928 + 0;
- 1 928 ÷ 2 = 964 + 0;
- 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.
1 011 010 952(10) = 11 1100 0100 0010 1100 1101 1000 1000(2)
3. Determine the signed binary number bit length:
The base 2 number's actual length, in bits: 30.
- 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, 30,
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:
1 011 010 952(10) Base 10 integer number converted and written as a signed binary code (in base 2):
1 011 010 952(10) = 0011 1100 0100 0010 1100 1101 1000 1000
Spaces were used to group digits: for binary, by 4, for decimal, by 3.