Question: Two indices in a repitition statement?

Is there a way to do a repitition statement with two indices?  Something along the lines of:

for i,j from 1 by 1 to N do a[i][j]:=Re(b[i][3][1][j]); end do; ?

I know that the syntax used here doesn't work, but is there a way to do this?

 

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