Binary to Gray code conversion

It is easy to convert the binary number to gray number. First, for example take a binary number i.e ,101101.


Step 1: 101101 first write the MSB as it is i.e, darken bit i.e, 1

Step 2: add MSB and bit next to the MSB i.e, 1+0=1

Step 3: again add 0 and 1 we get i.e, 0+1=1
Step 4: again add 1 and 1 we get 1+1=0

Step 5: in previous step carry is occurred so neglect that carry . note that don't add carry to next add numbers
then again add 1+0 1+0=1

step 6: add 0+1 0+1= 1

Answer: Gray Code is : 111011

Just like any other binary coded conversions. The number 9 in "8421" is simply "1001" and converted to Gray (2421) is simply "1111." This follows with all numbers.

how come these 2 answers don't tally? if we were to use the first technique to convert binary 1001 it seems like we cant get 1111 doesn't it? or i mistaken the way?

It should go like for eg..for 1010 d conversion will be 1111..n for 1001 d conversion will be 1101

2421 code is a weighted code and gray code is an unweighted code.. so, they must be 2 different things

1111 then we have to convert it by following method.
first step=write 1

second step=add 2nd position of lsb to first pos, of lsb=1+1=10=0
third step=addsecnd &third of lsb position=1=1=0

answer=1000

Q: Where we use binary to Gray code and vice-versa...?

first write 1 then 1 EXOR 1 then 1 EXOR 1 THEN 1 EXOR 1
so answer is 1000