What are the required steps to convert base 10 integer
number 107 768 784 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;
- 107 768 784 ÷ 2 = 53 884 392 + 0;
- 53 884 392 ÷ 2 = 26 942 196 + 0;
- 26 942 196 ÷ 2 = 13 471 098 + 0;
- 13 471 098 ÷ 2 = 6 735 549 + 0;
- 6 735 549 ÷ 2 = 3 367 774 + 1;
- 3 367 774 ÷ 2 = 1 683 887 + 0;
- 1 683 887 ÷ 2 = 841 943 + 1;
- 841 943 ÷ 2 = 420 971 + 1;
- 420 971 ÷ 2 = 210 485 + 1;
- 210 485 ÷ 2 = 105 242 + 1;
- 105 242 ÷ 2 = 52 621 + 0;
- 52 621 ÷ 2 = 26 310 + 1;
- 26 310 ÷ 2 = 13 155 + 0;
- 13 155 ÷ 2 = 6 577 + 1;
- 6 577 ÷ 2 = 3 288 + 1;
- 3 288 ÷ 2 = 1 644 + 0;
- 1 644 ÷ 2 = 822 + 0;
- 822 ÷ 2 = 411 + 0;
- 411 ÷ 2 = 205 + 1;
- 205 ÷ 2 = 102 + 1;
- 102 ÷ 2 = 51 + 0;
- 51 ÷ 2 = 25 + 1;
- 25 ÷ 2 = 12 + 1;
- 12 ÷ 2 = 6 + 0;
- 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.
107 768 784(10) = 110 0110 1100 0110 1011 1101 0000(2)
3. Determine the signed binary number bit length:
The base 2 number's actual length, in bits: 27.
- 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, 27,
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:
107 768 784(10) Base 10 integer number converted and written as a signed binary code (in base 2):
107 768 784(10) = 0000 0110 0110 1100 0110 1011 1101 0000
Spaces were used to group digits: for binary, by 4, for decimal, by 3.