HP C A.06.05 Reference Manual

Expressions and Operators
Function Calls
Chapter 5108
Function Recursion
All functions are recursive both in the direct and indirect sense. Function A can call itself
directly or function A can call function B which, in turn, calls function A. Note that each
invocation of a function requires program stack space. For this reason, the depth of recursion
depends upon the size of the execution stack.