How to store a value in Simulink?

Hello everyone I am desgning a model in which I need to store a value . For example: there is 2 inputs to the subsystem, input a & b .If a &b both are true, I calculate some values,say, x1 and x2. Now, next time when either a or b is false, I want to use those previously calcutaed values (i.e. when a & b were true). So, is there any way to store x1 and x2 in Simulink to use it later? Thanks in adcance.

Answer 1

[Azzi Abdelmalek]

If you mean how to use the previous values, you can use unit delay block . Or if you are using a Matlab function block you can use persistent command.