Binary to Gray coding

Given binary code 01001, convert to gray code like this:
1) there are 5 digits (n=5), so we have b5=0, b4=1, b3=0, b2=0, b1=1
2) g5=b5 = 0
3) g4 = b4 XOR b5 = 1 XOR 0 = 1
4) g3 = b3 XOR b4 = 0 XOR 1 = 1
5) g2 = b2 XOR b3 = 0 XOR 0 = 0
6) g1 = b1 XOR b2 = 1 XOR 0 = 1
7) gray code equivalent of binary code 01001 = 01101

Similary

Decimal	Binary	Gray
0	000	000
1	001	001
2	010	011
3	011	010
4	100	110
5	101	111
6	110	101
7	111	100