< Less than

Compares each element in the left-hand argument with the corresponding element in the right-hand argument. If an element in the left-hand argument is less than the corresponding right-hand element, the result of that comparison is 1. Otherwise it is 0. (This operation is affected by ⎕CT, the comparison tolerance)

             12 < 1
       0
             2 < 12
       1
             12 < 12
       0
             11 7 2 5 < 11 3 2 6     (Compares each element in a vector with
       0 0 0 1                        the corresponding element in a vector of
                                      equal length)

             ¯3 < ¯4                 (Compares negative numbers. The number
       0                              nearer 0 is considered the greater.)

             8 < 2+2+2+2             (The right argument is evaluated
       0                              before the comparison is made)

             TABLE ← 2 3 ⍴ 1 2 3 4 5 6
             MABLE ← 2 3 ⍴ 3 3 3 5 5 5
             TABLE < MABLE           (Compares each element in a matrix
       1 1 0                          with the corresponding element in
       1 0 0                          a matrix of equal size and dimensions)
             3<TABLE
       0 0 0
       1 1 1
             3 < TABLE MABLE         (Compares 3 with the elements of the
        0 0 0  0 0 0                  nested vector)
        1 1 1  1 1 1