Operators are symbols that represent operations. Operands are things to the (left) right of an operator.
Operators are a kind of function, and thus are themselves first-class objects that can be bound to variables. When binding, it is necessary to enclose it with ``.
-), there are both unary and binary operators, so
+_(unary operation ) must be specified.
add = `+` # SyntaxError: specify `_+_` or `+_`
add = `_+_` assert add(1, 2) == 3 assert add("a", "b") == "ab" mul = `*` # OK, this is binary only assert mul(1, 2) == 2
Some fundamental operators, called special forms, cannot be bound.
def = `=` # SyntaxError: cannot bind `=` operator, this is a special form # NG: def x, 1 function = `->` # SyntaxError: cannot bind `->` operator, this is a special form # NG: function x, x + 1