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 In neurobiology synapse is a junction between two nerve cells, consisting of a minute gap across which impulses pass by diffusion of a neurotransmitter. 
 In an SNN, synapse is the weighted path for generated spikes from one neuron to the other connected neurons.
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 This is the implementation of a simple network of 2 layers with 5 neurons in the first layer and 3 in the second as shown in the figure. Each neuron in the first layer is connected to all the neurons in the second layer via synapse. Synapses are realised by a 2D matrix of size (5x3) initialised with random weights.