How to convert the base ten signed integer number -1 768 048 496 to base two:
- 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.
To convert a base ten signed number (written as an integer in decimal system) to base two, written as a signed binary, follow the steps below.
- Divide the number repeatedly by 2: keep track of each remainder.
- Stop when you get a quotient that is equal to zero.
- Construct the base 2 representation of the positive number: take all the remainders starting from the bottom of the list constructed above.
- Determine the signed binary number bit length.
- Get the binary computer representation: if needed, add extra 0s in front (to the left) of the base 2 number, up to the required length and change the first bit (the leftmost), from 0 to 1, if the number is negative.
- Below you can see the conversion process to a signed binary and the related calculations.
1. Start with the positive version of the number:
|-1 768 048 496| = 1 768 048 496
2. 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;
- 1 768 048 496 ÷ 2 = 884 024 248 + 0;
- 884 024 248 ÷ 2 = 442 012 124 + 0;
- 442 012 124 ÷ 2 = 221 006 062 + 0;
- 221 006 062 ÷ 2 = 110 503 031 + 0;
- 110 503 031 ÷ 2 = 55 251 515 + 1;
- 55 251 515 ÷ 2 = 27 625 757 + 1;
- 27 625 757 ÷ 2 = 13 812 878 + 1;
- 13 812 878 ÷ 2 = 6 906 439 + 0;
- 6 906 439 ÷ 2 = 3 453 219 + 1;
- 3 453 219 ÷ 2 = 1 726 609 + 1;
- 1 726 609 ÷ 2 = 863 304 + 1;
- 863 304 ÷ 2 = 431 652 + 0;
- 431 652 ÷ 2 = 215 826 + 0;
- 215 826 ÷ 2 = 107 913 + 0;
- 107 913 ÷ 2 = 53 956 + 1;
- 53 956 ÷ 2 = 26 978 + 0;
- 26 978 ÷ 2 = 13 489 + 0;
- 13 489 ÷ 2 = 6 744 + 1;
- 6 744 ÷ 2 = 3 372 + 0;
- 3 372 ÷ 2 = 1 686 + 0;
- 1 686 ÷ 2 = 843 + 0;
- 843 ÷ 2 = 421 + 1;
- 421 ÷ 2 = 210 + 1;
- 210 ÷ 2 = 105 + 0;
- 105 ÷ 2 = 52 + 1;
- 52 ÷ 2 = 26 + 0;
- 26 ÷ 2 = 13 + 0;
- 13 ÷ 2 = 6 + 1;
- 6 ÷ 2 = 3 + 0;
- 3 ÷ 2 = 1 + 1;
- 1 ÷ 2 = 0 + 1;
3. Construct the base 2 representation of the positive number:
Take all the remainders starting from the bottom of the list constructed above.
1 768 048 496(10) = 110 1001 0110 0010 0100 0111 0111 0000(2)
4. 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.
5. 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:
1 768 048 496(10) = 0110 1001 0110 0010 0100 0111 0111 0000
6. Get the negative integer number representation:
To get the negative integer number representation on 32 bits (4 Bytes),
... change the first bit (the leftmost), from 0 to 1...
Number -1 768 048 496(10), a signed integer number (with sign),
converted from decimal system (from base 10)
and written as a signed binary (in base 2):
-1 768 048 496(10) = 1110 1001 0110 0010 0100 0111 0111 0000
Spaces were used to group digits: for binary, by 4, for decimal, by 3.