# Parametric Gates

We'll look at some general gates that are useful for advanced quantum algorithms.

## We'll cover the following

We’ve introduced you to the basic single qubit and multi-qubit gates that are widely used while working on quantum algorithms. However, those gates always perform a fixed operation or a fixed rotation around one of the axes of the **Bloch** Sphere. What if we wanted to change the state of a qubit to any state of our choice or, perform a rotation on the **Bloch** Sphere using some arbitrary value? This is where **parametric** gates come in. Such gates come in handy while working on **variational quantum algorithms.**

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