4.1 Given:

    INTEGER :: i = 3, j = 7
    REAL, DIMENSION(1:20) :: A

which of the following are valid array references for the array:

a)    A(12)
b)    A(21)
c)    A(I*J-1)
d)    A(3.0)
e)    A(I*J) 
f)    A(1+INT(4.0*ATAN(1.0)))

[ Hint: 4.0*ATAN(1.0) is pi ]

Answer: a, c and f.