Kirchhoff's Current Law (KCL) states that the total electric current entering a junction in an electrical circuit must equal the total current leaving that junction. This principle is based on the conservation of electric charge, meaning that charge cannot accumulate at the junction. In practical terms, if three wires meet at a point and carry currents of 2 A, 3 A, and 4 A, KCL tells us that the current flowing into the junction (2 A + 3 A = 5 A) must equal the current flowing out (4 A). This law is fundamental for analyzing and designing electrical circuits.