What are the required steps to convert base 10 integer
number 24 052 574 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;
- 24 052 574 ÷ 2 = 12 026 287 + 0;
- 12 026 287 ÷ 2 = 6 013 143 + 1;
- 6 013 143 ÷ 2 = 3 006 571 + 1;
- 3 006 571 ÷ 2 = 1 503 285 + 1;
- 1 503 285 ÷ 2 = 751 642 + 1;
- 751 642 ÷ 2 = 375 821 + 0;
- 375 821 ÷ 2 = 187 910 + 1;
- 187 910 ÷ 2 = 93 955 + 0;
- 93 955 ÷ 2 = 46 977 + 1;
- 46 977 ÷ 2 = 23 488 + 1;
- 23 488 ÷ 2 = 11 744 + 0;
- 11 744 ÷ 2 = 5 872 + 0;
- 5 872 ÷ 2 = 2 936 + 0;
- 2 936 ÷ 2 = 1 468 + 0;
- 1 468 ÷ 2 = 734 + 0;
- 734 ÷ 2 = 367 + 0;
- 367 ÷ 2 = 183 + 1;
- 183 ÷ 2 = 91 + 1;
- 91 ÷ 2 = 45 + 1;
- 45 ÷ 2 = 22 + 1;
- 22 ÷ 2 = 11 + 0;
- 11 ÷ 2 = 5 + 1;
- 5 ÷ 2 = 2 + 1;
- 2 ÷ 2 = 1 + 0;
- 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.
24 052 574(10) = 1 0110 1111 0000 0011 0101 1110(2)
3. Determine the signed binary number bit length:
The base 2 number's actual length, in bits: 25.
- 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, 25,
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:
24 052 574(10) Base 10 integer number converted and written as a signed binary code (in base 2):
24 052 574(10) = 0000 0001 0110 1111 0000 0011 0101 1110
Spaces were used to group digits: for binary, by 4, for decimal, by 3.