(iii) 1 + 1 = 0 (with a carry of 1, which is to be neglected).įind the Gray Code of the Decimal number 5. While calculating the sum, the following guidelines should be observed: (iii) The second and the successive bits in the Gray Code will be the sum of the Bit in the position and the previous position in the BCD Code. (ii) The most significant Bit in the Gray Code is the same as in the BCD Code Because of this, Excess Three Code is said to be self-complementing. This applies to all decimal digits 0 to 9 (refer Table 3.4). This represents 3 in the Excess Three Code itself. The decimal digit 6 will be expressed in the Excess Three code as 1001. In this case, it will be 1001, which is 9 in the Decimal system and not 3. The BCD code is not a self- complementing code in the sense that the Binary Form complement of a decimal number will not be its Decimal form complement, (e.g,) 6 in BCD Code is 0110 complement of this Binary form is obtained by replacing all l’s by 0’s and vice versa.

In a Binary Code, 1 and 0 are each complement to the other.

The complement of any single digit in any number system is the difference between the maximum value of a discrete character in that system and the number under consideration, (e.g.,) In the Decimal system, the complement, of 6 is 3 (i.e.,) (9 - 6). The Excess Three Code is said to be Self-Complementing code. The BCD code of 7, namely 0111 will be 4 in the Excess Three Code (refer Table 3.4). But it's still fun to play with.This is a Binary code in which each decimal number is expressed in excess of three, i.e, 3 is added to the decimal number and then coded into Binary digits, e.g, to get the Excess Three Code of 4, 3 is added to it which gives 7. Why? Because, in order to decode it, you need to know how many letters the message was shifted in the first place! Of course, if you don't know, it's not impossible.you just have to 'unshift' it one letter at a time, until you get a message that makes sense!ĭo you think people use this code for things they need to keep secret? No, they don't. Is this code difficult to decode? Well, it's only a little bit harder to decode than the Backwards Alphabet Code. This encoder Shifts all the letters one, so an A becomes a B, a B becomes a C, and so on. Get the idea? Now you can try the Encoder at the top of the page. Uh oh again! what happens when I get to the letter Y? I can't count forward 3 letters, because there aren't enough letters in the alphabet! That's okay.just start over at the beginning, after you count the Z. Uh oh.what about punctuation (like that question mark at the end of 'Hi, HOW ARE YOU?'? Just leave that exactly the way it is. Keep going through the whole message like that. Then, since the next letter is I, find the I and count forward to get the letter L.

So, if my message was 'HI, HOW ARE YOU?' I would begin by finding the letter H, then counting foward three letters, to get the letter K. Now, when you write down your coded message, instead of writing the realletter, you find that letter in the alphabet and count forward - as many letters as the number you picked. Begin by writing down the alphabet in order on a piece of paper (or use the one below).Ī B C D E F G H I J K L M N O P Q R S T U V W X Y Z The Shifted Alphabet Code is very very easy to do.

Numerical code translator