what is quantum computer,how Quantum computer works ?

Quantum computing is a type of computing where data is processed using quantum bits, also known as qubits, instead of classical bits. In a classical computer, a bit is a unit of information that can have only two values: 0 or 1. In a quantum computer, a qubit can exist in a state of 0, 1, or a combination of both at the same time, known as a superposition. This allows quantum computers to perform certain types of calculations much faster than classical computers. Additionally, quantum computers can also use a phenomenon known as entanglement to perform operations on multiple qubits at once.