\[DoubleLeftArrow]

  • Unicode: 21D0.
  • Alias: ␣<=.
  • Infix arrow operator.
  • x y is by default interpreted as DoubleLeftArrow[x,y].
  • Extensible character.
  • <= is the alias for \[LessEqual]. The alias for \[DoubleLeftArrow] has a space at the beginning.