One's Complement: Integer ↗ Binary: -37 315 577 Convert the Integer Number to a Signed Binary in One's Complement Representation. Write the Base Ten Decimal System Number as a Binary Code (Written in Base Two)

Signed integer number -37 315 577(10) converted and written as a signed binary in one's complement representation (base 2) = ?

1. Start with the positive version of the number:

|-37 315 577| = 37 315 577

2. Divide the number repeatedly by 2:

Keep track of each remainder.

We stop when we get a quotient that is equal to zero.


  • division = quotient + remainder;
  • 37 315 577 ÷ 2 = 18 657 788 + 1;
  • 18 657 788 ÷ 2 = 9 328 894 + 0;
  • 9 328 894 ÷ 2 = 4 664 447 + 0;
  • 4 664 447 ÷ 2 = 2 332 223 + 1;
  • 2 332 223 ÷ 2 = 1 166 111 + 1;
  • 1 166 111 ÷ 2 = 583 055 + 1;
  • 583 055 ÷ 2 = 291 527 + 1;
  • 291 527 ÷ 2 = 145 763 + 1;
  • 145 763 ÷ 2 = 72 881 + 1;
  • 72 881 ÷ 2 = 36 440 + 1;
  • 36 440 ÷ 2 = 18 220 + 0;
  • 18 220 ÷ 2 = 9 110 + 0;
  • 9 110 ÷ 2 = 4 555 + 0;
  • 4 555 ÷ 2 = 2 277 + 1;
  • 2 277 ÷ 2 = 1 138 + 1;
  • 1 138 ÷ 2 = 569 + 0;
  • 569 ÷ 2 = 284 + 1;
  • 284 ÷ 2 = 142 + 0;
  • 142 ÷ 2 = 71 + 0;
  • 71 ÷ 2 = 35 + 1;
  • 35 ÷ 2 = 17 + 1;
  • 17 ÷ 2 = 8 + 1;
  • 8 ÷ 2 = 4 + 0;
  • 4 ÷ 2 = 2 + 0;
  • 2 ÷ 2 = 1 + 0;
  • 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.


37 315 577(10) = 10 0011 1001 0110 0011 1111 1001(2)


4. Determine the signed binary number bit length:

The base 2 number's actual length, in bits: 26.


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) indicates 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, 26,

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.


37 315 577(10) = 0000 0010 0011 1001 0110 0011 1111 1001


6. Get the negative integer number representation:

To write the negative integer number on 32 bits (4 Bytes),

as a signed binary in one's complement representation,


... replace all the bits on 0 with 1s and all the bits set on 1 with 0s.


Reverse the digits, flip the digits:

Replace the bits set on 0 with 1s and the bits set on 1 with 0s.

-37 315 577(10) = !(0000 0010 0011 1001 0110 0011 1111 1001)


Number -37 315 577(10), a signed integer number (with sign), converted from decimal system (from base 10) and written as a signed binary in one's complement representation:

-37 315 577(10) = 1111 1101 1100 0110 1001 1100 0000 0110

Spaces were used to group digits: for binary, by 4, for decimal, by 3.

The latest signed integer numbers converted from decimal system (base ten) and written as signed binary in one's complement representation

How to convert signed integers from the decimal system to signed binary in one's complement representation

Follow the steps below to convert a signed base 10 integer number to signed binary in one's complement representation:

  • 1. If the number to be converted is negative, start with the positive version of the number.
  • 2. Divide repeatedly by 2 the positive representation of the integer number that is to be converted to binary, keeping track of each remainder, until we get a quotient that is equal to ZERO.
  • 3. Construct the base 2 representation of the positive number, by taking all the remainders starting from the bottom of the list constructed above. Thus, the last remainder of the divisions becomes the first symbol (the leftmost) of the base two number, while the first remainder becomes the last symbol (the rightmost).
  • 4. Binary numbers represented in computer language must have 4, 8, 16, 32, 64, ... bit length (a power of 2) - if needed, fill in '0' bits in front (to the left) of the base 2 number calculated above, up to the right length; this way the first bit (leftmost) will always be '0', correctly representing a positive number.
  • 5. To get the negative integer number representation in signed binary one's complement, replace all '0' bits with '1's and all '1' bits with '0's.

Example: convert the negative number -49 from the decimal system (base ten) to signed binary one's complement:

  • 1. Start with the positive version of the number: |-49| = 49
  • 2. Divide repeatedly 49 by 2, keeping track of each remainder:
    • division = quotient + remainder
    • 49 ÷ 2 = 24 + 1
    • 24 ÷ 2 = 12 + 0
    • 12 ÷ 2 = 6 + 0
    • 6 ÷ 2 = 3 + 0
    • 3 ÷ 2 = 1 + 1
    • 1 ÷ 2 = 0 + 1
  • 3. Construct the base 2 representation of the positive number, by taking all the remainders starting from the bottom of the list constructed above:
    49(10) = 11 0001(2)
  • 4. The actual bit length of base 2 representation is 6, so the positive binary computer representation of a signed binary will take in this case 8 bits (the least power of 2 that is larger than 6) - add '0's in front of the base 2 number, up to the required length:
    49(10) = 0011 0001(2)
  • 5. To get the negative integer number representation in signed binary one's complement, replace all '0' bits with '1's and all '1' bits with '0's:
    -49(10) = 1100 1110
  • Number -49(10), signed integer, converted from the decimal system (base 10) to signed binary in one's complement representation = 1100 1110