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Dot can be used as a Dyadic operator with Dyadic operands

Operator Dot means

Inner Product

      1 2 3 +.× 4 5 6
32
      3 ∧.= 3 3 3 3
1
      mat
1 2
3 4
      mat +.× mat   ⍝ matrix product
 7 10
15 22

Used with Jot in place of the left operand Jot Dot means

Outer Product

      1 2 3 ∘.× 4 5 6 7
 4  5  6  7
 8 10 12 14
12 15 18 21

N.B. Dot is also used as a decimal point and as a name separator in namespace reference syntax.

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