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This BCD code is used for arithmetic operations as it overcomes the drawbacks of adding two decimal digits whose sum is greater than 9 using the 8421 BCD code. What is the code?

This BCD code is used for arithmetic operations as it overcomes the drawbacks of adding two decimal digits whose sum is greater than 9 using the 8421 BCD code. What is the code? Correct Answer Excess-3 <span style="">BCD </span>code

Excess-3 BCD code:

  • The excess-3 code is a non-weighted and self-complementary BCD code used to represent the decimal numbers.
  • This code plays an important role in arithmetic operations because it resolves deficiencies encountered when we use the 8421 BCD code for adding two decimal digits whose sum is greater than 9. 
  • Excess-3 code of a decimal number is obtained by simply adding 3 to each decimal digit.
  • Then write the 4-bit binary number for each digit of the decimal number. 

For example: 

Excess-3 code for (2)10 is:

Step 1: Binary equivalent of (2)10 is 0010.

Step 2: Add 0110 to 0010.

Step 3: Excess-3 code for (2)10 is 0101.

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