There are commands to store a number in a register, to insert the number in the buffer in decimal, and to increment it. These commands can be useful in keyboard macros (see Keyboard Macros).
Store number into register reg (number-to-register
).
Increment the number in register reg by number
(increment-register
).
Insert the number from register reg into the buffer.
C-x r g is the same command used to insert any other sort of register contents into the buffer.