Returns the value A at initialization and does not change it during a simulation. INITIAL is used to record and hold or "remember" a variable's starting value.
Restrictions: Must appear first on the right of the = sign and not be followed by anything else. It defines a variable as being an Initial variable.
Units: Initial (unit) --> unit
Example
x init = INITIAL (x) - x init is set equal to the first value of x.
See also: REINITIAL
Sample model: INITIAL.mdl in FunctionExamples
