The SPICE input file will also contain control statements that specify the type of analysis to be done and the outputs to be viewed. The default mode of analysis, we will get the dc solution we are presently interested in generating. The output may be a list of numbers, or it may be plotted. For dc circuits, whose circuit variables do not vary over time, only the numerical output needs to be considered. For outputting a list of numbers, the control statement is CVLTST is a list of the circuit variables we wish printed out. Each voltage in the list is formatted, the node voltage at node I minus that at node J. Each current in CVLTST is formatted I. This is the current I through element NXXXX, with the reference arrow for I pointing from the first node to the second node appearing in the element statement foe NXXXX. For instance, V(2,5) is the voltage at node 2 minus the voltage at node 5,V(3) is the voltage at node 3 relative to node 0 , and I(VREF) is the current through the voltage source VREF, with current reference direction pointing from the plus end of VREF toward the minus end.