CODEWITHSUNDEEP
haskellbinary-operators
IPiiro
IPiiro

Reputation: 97

What are binary operators in haskell

So I wanted to understand the functions foldl and foldr in Hoogle they say that these functions apply to binary operators. But I don't get what these binary operators are. I know that (+) and (-) are binary operators but what defines them ?

Upvotes: 2

Views: 3477

Answers (1)

willeM_ Van Onsem
willeM_ Van Onsem

Reputation: 476709

Usually mathematicians define a binary operator is a function that takes two arguments. In some papers it is a requirement that the arguments and the result are defined over the same set.

The fact that the function ? takes two arguments results in the fact that mathematicians frequently use infix notation (like x ? y). For instance (+), (*), etc. are clearly binary operators.

Upvotes: 3

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