==> -- a binary operator

Ways to use `symbol ==>` :

"Expression ==> Expression" -- see Expression -- the class of all expressions
"Expression ==> Holder" -- see Expression -- the class of all expressions
"Expression ==> Thing" -- see Expression -- the class of all expressions
"Holder ==> Expression" -- see Expression -- the class of all expressions
"Holder ==> Holder" -- see Expression -- the class of all expressions
"Thing ==> Expression" -- see Expression -- the class of all expressions

For the programmer

The object ==> is a keyword.

This operator may be used as a binary operator in an expression like x==>y. The user may install binary methods for handling such expressions with code such as

         X ==> Y := (x,y) -> ...

where X is the class of x and Y is the class of y.

==> -- a binary operator

Ways to use symbol ==> :

For the programmer

Ways to use `symbol ==>` :