# Signed Binary: Integer Number 314 159 265 350 Converted and Written as a Signed Binary. Base Ten Decimal System Numbers Conversions

## Integer number 314 159 265 350(10) written as a signed binary number

### 1. Divide the number repeatedly by 2:

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

• division = quotient + remainder;
• 314 159 265 350 ÷ 2 = 157 079 632 675 + 0;
• 157 079 632 675 ÷ 2 = 78 539 816 337 + 1;
• 78 539 816 337 ÷ 2 = 39 269 908 168 + 1;
• 39 269 908 168 ÷ 2 = 19 634 954 084 + 0;
• 19 634 954 084 ÷ 2 = 9 817 477 042 + 0;
• 9 817 477 042 ÷ 2 = 4 908 738 521 + 0;
• 4 908 738 521 ÷ 2 = 2 454 369 260 + 1;
• 2 454 369 260 ÷ 2 = 1 227 184 630 + 0;
• 1 227 184 630 ÷ 2 = 613 592 315 + 0;
• 613 592 315 ÷ 2 = 306 796 157 + 1;
• 306 796 157 ÷ 2 = 153 398 078 + 1;
• 153 398 078 ÷ 2 = 76 699 039 + 0;
• 76 699 039 ÷ 2 = 38 349 519 + 1;
• 38 349 519 ÷ 2 = 19 174 759 + 1;
• 19 174 759 ÷ 2 = 9 587 379 + 1;
• 9 587 379 ÷ 2 = 4 793 689 + 1;
• 4 793 689 ÷ 2 = 2 396 844 + 1;
• 2 396 844 ÷ 2 = 1 198 422 + 0;
• 1 198 422 ÷ 2 = 599 211 + 0;
• 599 211 ÷ 2 = 299 605 + 1;
• 299 605 ÷ 2 = 149 802 + 1;
• 149 802 ÷ 2 = 74 901 + 0;
• 74 901 ÷ 2 = 37 450 + 1;
• 37 450 ÷ 2 = 18 725 + 0;
• 18 725 ÷ 2 = 9 362 + 1;
• 9 362 ÷ 2 = 4 681 + 0;
• 4 681 ÷ 2 = 2 340 + 1;
• 2 340 ÷ 2 = 1 170 + 0;
• 1 170 ÷ 2 = 585 + 0;
• 585 ÷ 2 = 292 + 1;
• 292 ÷ 2 = 146 + 0;
• 146 ÷ 2 = 73 + 0;
• 73 ÷ 2 = 36 + 1;
• 36 ÷ 2 = 18 + 0;
• 18 ÷ 2 = 9 + 0;
• 9 ÷ 2 = 4 + 1;
• 4 ÷ 2 = 2 + 0;
• 2 ÷ 2 = 1 + 0;
• 1 ÷ 2 = 0 + 1;

## 314 159 265 350(10) = 0000 0000 0000 0000 0000 0000 0100 1001 0010 0101 0101 1001 1111 0110 0100 0110

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

## How to convert signed integers from decimal system to binary code system

### Follow the steps below to convert a signed base ten integer number to signed binary:

• 1. In a signed binary, first bit (the leftmost) is reserved for sign: 0 = positive integer number, 1 = positive integer number. If the number to be converted is negative, start with its positive version.
• 2. Divide repeatedly by 2 the positive integer number keeping track of each remainder. STOP when we get a quotient that is 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 have a length of 4, 8, 16, 32, 64, ... bits (power of 2) - if needed, fill in extra '0' bits in front of the base 2 number (to the left), up to the right length; this way the first bit (the leftmost one) is always '0', as for a positive representation.
• 5. To get the negative reprezentation of the number, simply switch the first bit (the leftmost one), from '0' to '1'.

### Example: convert the negative number -63 from decimal system (base ten) to signed binary code system:

• 1. Start with the positive version of the number: |-63| = 63;
• 2. Divide repeatedly 63 by 2, keeping track of each remainder, until we get a quotient that is equal to zero:
• division = quotient + remainder
• 63 ÷ 2 = 31 + 1
• 31 ÷ 2 = 15 + 1
• 15 ÷ 2 = 7 + 1
• 7 ÷ 2 = 3 + 1
• 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:
63(10) = 11 1111(2)
• 4. The actual length of base 2 representation number is 6, so the positive binary computer representation length of the signed binary will take in this case 8 bits (the least power of 2 higher than 6) - add extra '0's in front (to the left), up to the required length; this way the first bit (the leftmost one) is to be '0', as for a positive number:
63(10) = 0011 1111(2)
• 5. To get the negative integer number representation simply change the first bit (the leftmost), from '0' to '1':
-63(10) = 1011 1111
• Number -63(10), signed integer, converted from decimal system (base 10) to signed binary = 1011 1111