4.5 Decrement and increment operators

Increment and decrement of integers are supported using the builtins incr and decr:

\incr{number} \decr{number}

which expand to the numerical value of number, incremented, or decremented, respectively, by one.

\incr{4} =>5 \decr{7} =>6

Note that \decr and \incr take their arguments for 32-bit integers, not multi-precision integers used in \expr See section 4.7 Macros for doing arithmetic.