I'm making a simplified version of SPICE to teach basic electronics to high school students (This is for a high school independent study).
Why does SPICE analyze circuits using Kirchhoff's current law instead of Kirchhoff's voltage law? Usually you have a voltage source to start with instead of a current source, and it is easier and more efficient to analyze a circuit using voltage instead of current.
Using voltage to analyze circuit: (See best answer)
Using current to analyze circuit: