### U gate

*(Previously called the U3 gate)* The three parameters allow the construction of any single-qubit gate. Has a duration of one unit of gate time.

Composer reference | OpenQASM reference | Q-sphere | Note about q-sphere representations |
---|

| `u(theta, phi, lam) q[0];`
| | The q-sphere representation shows the state after the gate operates on the initial equal superposition state where is the number of qubits needed to support the gate. |

In IBM Quantum Composer, the default value for `angle`

is .