The n+ and n- are the positive and negative element nodes, respectively. The expr is an expression yielding the inductance in henries. This is the partial derivative of flux with respect to branch current, possibly as a function of other circuit variables. The keyword can alse be given as ``inductance'', or may be omitted since this is the default parameter. Note that the expression can depend on the branch current, in which case the device is nonlinear.
The second form allows specification of a polynomial inductance, which will take the form
Inductance = c0 + c1 . i + c2 . i2...where i is the current flowing through the device from the positive to the negative element nodes. There is no built-in limit to the number of terms.
The optional initial condition is the initial (time-zero) value of inductor current (in amps) that flows from n+, through the inductor, to n-. The initial conditions (if any) apply only when the uic option is specified in transient analysis.