The most recent version of this documentation can be found at https://docs.dyalog.com/20.0/.

Left Arrow ←
Dyadic Left Arrow means

Naming 

    V ← 5 6 7
    (i(j k)) ← 4(5 6)
    sum ← +⌿
    product ← {×/⍵}
    inverse ← ⍣¯1
Operator Left Arrow means

Modified Assignment 

    V +← 1
    V[2] ← 0
    (⊃V) ← 2

Language Elements