In a single closed loop, the current has the same value at any point. Charge is not used up as it goes round the circuit. A lamp or resistor transfers energy, but it does not use up charge, so the same amount of charge leaves it each second as enters it.
For example, if the current in the wire before a lamp is 0.7 A, the current in the wire after the lamp is also 0.7 A. If a cell drives a current of 3 A through three resistors in a single loop, the current through each resistor is 3 A.
A common mistake is to think the current gets smaller after each component. It does not. Energy is transferred as the charge goes round, but the current stays the same.
