Results that are not defined as numbers NaN => undef

11022018, 04:22 AM
(This post was last modified: 11032018 12:27 PM by compsystems.)
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Results that are not defined as numbers NaN => undef
Hello, users and developer group of the famous hpprime calculator
Sorry for my technical english. 0/0 returns undef // ok ∞/∞ returns undef // ok In the two previous cases the answer is undef synonymous of Not a Number acronym NaN With undef you can perform arithmetic operations, in the sense that any number added to undef gives another undef, that is undef+1 returns undef If F1(X):=1/X is defined then press [num/setup] key synonymous table of numerical values, and zoom integer we see that for X equal to 0, shows NaN, then copy (Shift + view), then paste (Shift + menu), placed in the main view (history) NaN, but I can not operate artimetically, therefore it is required to made the acronym NaN be synonymous with undef In matlab NaN+1 returns NaN Thanks JaiMeza https://tiplanet.org/forum/portal.php 

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