Now, click to stat simulation button to test the circuit.
After clicking the start simulation button, move the handle of the slider switch to the left side, you will see 9V in the multi-meter. At this moment the battery is supplying voltage to the capacitor to charge the capacitor.This is the charging circuit of the capacitor.
When you will move the slider switch handle towards right side then you will see the value or charge of capacitor in the multi-meter. At this moment the capacitor will be used to supply the circuit. so, the Led will glow until the capacitor is charged and gradually the Led will turn off as capacitor discharges. This is the discharging of capacitor.