Glyph Input

MARPLE provides two methods for entering APL glyphs.

Backtick sequences

In the REPL, press ` (backtick) followed by a key. The APL glyph appears immediately — no Enter needed.

Type `` ` (two backticks) for a literal backtick.

Complete backtick table

Key	Glyph	Name	Key	Glyph	Name
`r	⍴	Rho (shape/reshape)	`i	⍳	Iota
`e	∈	Epsilon (membership)	`t	↑	Take
`y	↓	Drop	`q	⌽	Reverse/rotate
`Q	⍉	Transpose	`g	⍋	Grade up
`G	⍒	Grade down	`-	×	Times
`=	÷	Divide	`<	≤	Less or equal
`>	≥	Greater or equal	`/	≠	Not equal
`^	∧	And	`v	∨	Or
`~	⍲	Nand	`T	⍱	Nor
`*	⍟	Log	`o	○	Circle
`!	⌈	Ceiling	`d	⌊	Floor
`p	⌈	Ceiling (alt)	`b	⌊	Floor (alt)
`D	⌹	Domino (matrix)	`n	⊤	Encode
`N	⊥	Decode	`w	⍵	Omega (right arg)
`a	⍺	Alpha (left arg)	`V	∇	Del (self-ref)
`l	←	Assignment	`x	⋄	Diamond
`z	⍎	Execute	`Z	⍕	Format
`j	∘	Jot (compose)	`J	⍤	Rank
`I	⌷	From (squad)	`B	⌶	I-beam
`2	¯	High minus	`c	⍝	Comment
`[	{	Left brace	`]	}	Right brace

Example

To type double←{⍵+⍵}, you would type:

double`l`[`w+`w`]

Keyboard layout

If you have a Dyalog APL keyboard layout installed (e.g. via setxkbmap with grp:win_switch), you can use the Win key to type APL glyphs directly. The REPL handles both methods — use whichever you prefer.