Mnemonics

"fast arrow", "double arrow"

• Hyperoperators transcend operators, as this unicode character transcends ASCII

Used in a brace pair

«» is shorthand for qq:ww, the interpolated version of the quoted array constructor

Operators containing this character

This character (and its partner) are used to construct hyper operators

Other uses

<< can be used as a "Texas Quote" substitute for «, in environments where unicode source code is undesireable