27. The computer program product of claim 21 , comprising: computer readable program code configured to identify in the plurality of program statements a symbolic variable and an associated value for the symbolic variable.
27. The computer program product of claim 21 , comprising: computer readable program code configured to identify in the plurality of program statements a symbolic variable and an associated value for the symbolic variable. 28. The computer program product of claim 27 , wherein the input statement comprises the symbolic variable.