Kirchhoff's Current Law
Kirchhoff's first law, abbreviated as KCL, says the sum of all currents that enter or leave a junction or node equals 0. Or you could say the current going into is equal to the current going out of a junction or node.
Kirchhoff's Voltage Law
Kirchhoff's second law, abbreviated as KVL, says the sum of all voltages in an circuit loop is 0.