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• hello and

• welcome to the tutorial of 2421, for 2421

• weighted code you might have some question that for example

• what's the correct way to write 2 or 4 5 lets find out

• for 2 we could write simply that 0 0

• 1 0 or 1

• 0 0 then

• which which one will be correct for four

• also 0 1 0 0

• and 1 0 1 0

• but we can't understand that which one should be correct

• let's find out here we have the decimal equivalent of

• 2 4 2 1 remember one thing that

• every one code is a compliment of

• another for decimal o's 9's compliment will be 9

• 1's 9's compliment will be 8

• for 2 its 7 for three it's 6 for 4 it's 5

• here is the binary code and it's 1's complement

• we have to remember that for 0

• 2421 code will be 0 0 0 0

• then it's 9's complement would

• go to the 9 so its

• like that and the code is

• for 0000

• it's 1's complement is 11

• 11 for 1, 2421 code is

• 0 0 0 1 and its

• one's complement is one one

• one 0

• ok then for 2

• 0 0 one 0

• and it's 1's compliment will be

• one one 0 one

• for 3,

• 0011 and its

• one's complement is

• 1100 for 4

• 0100 and 5

• 1011

• umm remember another thing that

• it should be in increasing order

• ok

• Thank You...,

hello and

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