# Qubit Measurement

Let’s talk about probabilities, measurement, and extracting useful information out of qubits that will allow us to compute.

## Why measure?

Until this point, we have talked a lot about qubits, their states, and how they differ from classical bits. But the entire discussion would be meaningless if we did not have a way to **extract** information from these qubits. To extract information, we **measure** qubits.

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