Wikifunctions:Catalogue/Sign operations

Functions about the Type Sign (Z16659): The sign of a number

A sign can be positive, neutral, or negative.

Comparisons

invert sign (Z16676): Given a positive sign, returns negative, and vice versa. Neutral remains the same.
Sign identity (Z16821): returns the Sign argument unaltered
multiply signs (Z16728): the sign of the product of two numbers with the input signs

sign non-negative (Z16756): returns false if the input is negative, otherwise true
sign is non-positive (Z16768): returns true if the sign is either negative or neutral, otherwise positive

do these charges electrostatically attract? (Z16781): true only if one is negative and the other positive (or vice versa)
do these charges electrostatically repel (Z16793): true only if the charges are of the same sign
do these charges electrostatically interact (Z16897): True if neither input is neutral
sign of net charge from SMILES string (Z16718): takes a string representation of a molecular or ionic compound and returns whether it is positive, negative, or neutral overall

Boolean to Sign (Z17053): Return positive if true, or negative if false
sign of integer (Z17105): returns negative/neutral/positive
sign to unit integer (Z17151): Restituisce -1 se negativo, 0 se neutro e 1 se positivo
Gregorian era to sign (Z18072): সাধারণ অব্দকে ধনাত্মক এবং সাধারণ পূর্বাব্দকে ঋণাত্মক চিহ্নে পরিণত করবে
sign to Gregorian era (Z18080): ধনাত্মক চিহ্ন হবে সাধারণ অব্দ এবং ঋণাত্মক হবে সাধারণ পূর্বাব্দ
character to sign (Z18939): first char "+" = positive, "-" = negative, "0" = neutral. Add other symbols. Default neutral.
sign of rational number (Z19717): no description

sign of difference (Z16731): returns the sign of the subtraction: (first number - second number)
sign (a-b)*(a-c) (Z16762): returns the sign of the (natural number) calculation (a-b)*(a-c)