 Thus for example the value returned by and is +∞.The problem is particularly acute for the exponentiation function The expressions 00, ∞0 and 1∞ are considered indeterminate forms when they occur as limits (just like ∞ × 0), and the question of whether zero to the zero power should be defined as 1 has divided opinion.If the output is considered as undefined when a parameter is undefined, then should produce a qNaN.