What are the required steps to convert base 10 integer
number 416 410 278 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;
- 416 410 278 ÷ 2 = 208 205 139 + 0;
- 208 205 139 ÷ 2 = 104 102 569 + 1;
- 104 102 569 ÷ 2 = 52 051 284 + 1;
- 52 051 284 ÷ 2 = 26 025 642 + 0;
- 26 025 642 ÷ 2 = 13 012 821 + 0;
- 13 012 821 ÷ 2 = 6 506 410 + 1;
- 6 506 410 ÷ 2 = 3 253 205 + 0;
- 3 253 205 ÷ 2 = 1 626 602 + 1;
- 1 626 602 ÷ 2 = 813 301 + 0;
- 813 301 ÷ 2 = 406 650 + 1;
- 406 650 ÷ 2 = 203 325 + 0;
- 203 325 ÷ 2 = 101 662 + 1;
- 101 662 ÷ 2 = 50 831 + 0;
- 50 831 ÷ 2 = 25 415 + 1;
- 25 415 ÷ 2 = 12 707 + 1;
- 12 707 ÷ 2 = 6 353 + 1;
- 6 353 ÷ 2 = 3 176 + 1;
- 3 176 ÷ 2 = 1 588 + 0;
- 1 588 ÷ 2 = 794 + 0;
- 794 ÷ 2 = 397 + 0;
- 397 ÷ 2 = 198 + 1;
- 198 ÷ 2 = 99 + 0;
- 99 ÷ 2 = 49 + 1;
- 49 ÷ 2 = 24 + 1;
- 24 ÷ 2 = 12 + 0;
- 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.
416 410 278(10) = 1 1000 1101 0001 1110 1010 1010 0110(2)
3. Determine the signed binary number bit length:
The base 2 number's actual length, in bits: 29.
- 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, 29,
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:
416 410 278(10) Base 10 integer number converted and written as a signed binary code (in base 2):
416 410 278(10) = 0001 1000 1101 0001 1110 1010 1010 0110
Spaces were used to group digits: for binary, by 4, for decimal, by 3.