Bits vs. Qubits

• Classical Bit: 0 or 1. Like a light switch.
• Quantum Qubit: A linear combination of 0 and 1. Like a spinning coin.

The Probabilistic Nature

In classical programming, if (x == 1) is certain. In quantum programming, we work with amplitudes. When we measure a qubit, it 'collapses' into a definite state (0 or 1), but before that, it exists in a spectrum of possibilities.