## What is BCD and explain?

Binary coded decimal (BCD) is a system of writing numerals that assigns a four-digit binary code to each digit 0 through 9 in a decimal (base-10) numeral. The four-bit BCD code for any particular single base-10 digit is its representation in binary notation, as follows: 0 = 0000. 1 = 0001. 2 = 0010.

### What is BCD value?

In computing and electronic systems, binary-coded decimal (BCD) is a class of binary encodings of decimal numbers where each digit is represented by a fixed number of bits, usually four or eight. Sometimes, special bit patterns are used for a sign or other indications (e.g. error or overflow).

#### How do you represent BCD code?

In the BCD numbering system, the given decimal number is segregated into chunks of four bits for each decimal digit within the number. Each decimal digit is converted into its direct binary form (usually represented in 4-bits)….Truth Table for Binary Coded Decimal.

DECIMAL NUMBER | BCD |
---|---|

3 | 0011 |

4 | 0100 |

5 | 0101 |

6 | 0110 |

**What is BCD in PLC?**

Binary-coded decimal (BCD) is a class of binary encodings of decimal numbers where each decimal is represented by a fixed number of bits, usually four or eight, which goes against the way humans compute data. This disconnect can cause problems for programmable logic controller (PLC) users.

**Why BCD codes are used?**

The main advantage of the Binary Coded Decimal system is that it is a fast and efficient system to convert the decimal numbers into binary numbers as compared to the pure binary system. But the BCD code is wasteful as many of the 4-bit states (10-to-16) are not used but decimal displays have important applications.

## What is the BCD code for 25?

Using this conversion, the number 25, for example, would have a BCD number of 0010 0101 or 00100101. However, in binary, 25 is represented as 11001.

### Is Gray code a BCD code?

Binary Coded Decimal (BCD) is a way to store the decimal numbers in binary form. Since there are 10 different combinations of BCD, we need at least a 4-bit Gray Code to create sufficient number of these combinations.

#### How do I add two BCD codes?

BCD addition of given Decimal numbers

- Input: A = 12, B = 20.
- Output: 110010.
- Explanation: The summation of A and B is 12 + 20 = 32. The binary representation of 3 = 0011. The binary representation of 2 = 0010. Therefore, the BCD Addition is “0011” + “0010” = “110010”

**How do I generate a Gray code?**

Generating a Gray code

- Commence with the simplest Gray code possible; that is, for a single bit.
- Create a mirror image of the existing Gray code below the original values.
- Prefix the original values with 0s and the mirrored values with 1s.
- Repeat steps 2) and 3) until the desired width is achieved.

**What are the 5 common binary codes?**

Some of the popular Binary Codes are BCD (8421), 2421, 5211, Excess-3, Gray.

## Why is BCD used?

BCD arithmetic is useful for exact decimal calculations, which is often a requirement for financial applications, accountancy, etc. It also makes things like multiplying/dividing by powers of 10 easier.

### How do you represent decimals in binary?

The most popular way to convert a decimal number into the binary is the double dabble method. In this method, the given decimal number is progressively divided by 2 and writing the remainder after each division. When all the remainder is read in reverse order, the binary number is obtained.

#### How many digits are in a binary code?

In a binary code there are only two digits: one and zero. Typical binary codes will use strings of ones and zeros to represent letters, numbers, or other concepts.

**What is the difference between binary and BCD code?**

BCD is binary coded decimal in which the binary switches in the computer are used to represent decimal numbers. So bcd digits will represent zero through nine. In contrast, binary numbers are represented by a series of zeroes and ones. Click to see full answer. Simply so, what is the advantage of using binary code instead of BCD code?