DEC Variable
Decrements a variable.
Variable can be any target of an assignment, but must be numeric.
It is the exact equivalent of
X = 7 DEC X PRINT X 6
DIM A AS Float[3, 3] X = 2 Y = 1 A[X, Y] = PI DEC A[X, Y] PRINT A[X, Y] 2.14159265359