Q. Example on Multi-statement FORALL construct?

The subsequent statements set every element of matrix X to sum of its indices. 

FORALL (i=1:m, j=1:n)      X(i,j) = i+j

and the below statement sets upper right triangle of matrix Y to zero . 

FORALL (i=1:n, j=1:n, i

Multi-statement FORALL construct:

Multi-statement FORALL is shorthand for series of single statement FORALLs. The syntax for FORALL is     

    FORALL (index-spec-list [,mask]) 

                    Body

             END FORALL

Nesting of FORALL is allowed.