1. The Perceptron

1. The Single Neuron

The atom of AI. It takes inputs, weighs them, and makes a decision.

• Weights ($w$): The importance of each input.
• Bias ($b$): The activation threshold.
• Dot Product: $z = w cdot x + b$

python
class Perceptron:
    def __init__(self, num_inputs):
        self.weights = np.random.randn(num_inputs)
        self.bias = np.random.randn()
    
    def forward(self, x):
        return np.dot(x, self.weights) + self.bias