In XCSB decimal constants begin with any of the digits 0 to 9 e.g. decimal constant hex constant binary constant 490x31 0b_0011_0001 470x2F0b_0010_1111 650x410b_0100_0001
e.g.
decimal constant hex constant binary constant 490x31 0b_0011_0001 470x2F0b_0010_1111 650x410b_0100_0001