**Importing Qiskit**:

Import the necessary modules to start working with Qiskit:

`from qiskit import *`

**Creating Quantum Circuits**:

Quantum circuits in Qiskit are built using the `QuantumCircuit`

class. You can add gates to the circuit to create quantum operations.pythonCopy code

`# Create a quantum circuit with 2 qubits circuit = QuantumCircuit(2) `

`# Add gates to the circuit circuit.h(0) `

`# Apply Hadamard gate to qubit 0 circuit.cx(0, 1) `

`# Apply CNOT gate from qubit 0 to qubit 1`

**Simulating Circuits**:

You can use Qiskit’s built-in simulators to simulate the behaviour of your quantum circuits. Aer provides various backends for simulation.python

`simulator = Aer.get_backend('qasm_simulator')`

`result = execute(circuit, simulator).result()`

`from qiskit.tools.visualization import plot_histogram`

`plot_histogram(result.get_counts(circuit))`

The Aer simulator is not always installed with qiskit. To get around this, use pip install qiskit-aer in your terminal. It is also important after this to shut down your jupyter notebook and reload it.

The results of this code should look like this:

Find out more here.