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Kirchhoff's Voltage Law (KVL) and Kirchhoff's Current Law (KCL) apply to both DC (Direct Current) and AC (Alternating Current) circuits.

KVL states that the algebraic sum of voltages around any closed loop in a circuit is zero. This law applies to both DC and AC circuits, as it does not depend on the frequency of the voltage.

KCL states that the algebraic sum of currents entering and leaving a node (or junction) in a circuit is zero. This law also applies to both DC and AC circuits, as it does not depend on the frequency of the current.

Therefore, KVL and KCL are fundamental laws of electrical circuits that apply to all types of circuits, regardless of whether they are DC or AC.