Kirchhoff’s current law is a fundamental law of Electrical Engineering which explains the relation between current passing through any node. The statement of the law says:
The sum of currents flowing into any node is equal to the sum of all currents flowing outside that node.
The most important concept associated with the law is the node. A node is any point where two or more than two components meet. In this video, the very basic and simple concepts of the law are explained.