Sure, if you try with non conformable arrays, gfortran for example would tell you something like this: Different shape for array assignment at (1) on dimensi

Sure, if you try with non conformable arrays, gfortran for example would tell you something like this: Different shape for array assignment at (1) on dimension 1 Note that a scalar is conformable to any array, so that A = 2 for example would work for any shape of A, and would fill A with 2's.