• → ClearAttributes

Attributes

WMA link

Attributes[symbol]

returns the attributes of symbol.

Attributes["string"]

returns the attributes of Symbol["string"].

Attributes[symbol] = {$attr_1$, $attr_2$}

sets the attributes of symbol, replacing any existing attributes.

• • Attributes[Plus]

• • Attributes["Plus"]

Attributes always considers the head of an expression:

• • Attributes[a + b + c]

You can assign values to Attributes to set attributes:

• • Attributes[f] = {Flat, Orderless}

• • f[b, f[a, c]]

Attributes must be symbols:

• • Attributes[f] := {a + b}

Use Symbol to convert strings to symbols:

• • Attributes[f] = Symbol["Listable"]

• • Attributes[f]