# Probability of a quantum particle [duplicate]

Now recently I have started quantum mechanics and I understood the wavefunction but I don't understand why $$|Ψ|^2$$ gives the probability density of a quantum particle. Is there a reason or perhaps maths behind it?

• $|\Psi(x)|^2 dx$ can be seen as a probability measure in the mathematical sense Jun 21 '20 at 12:28
• I have never heard a satisfying argument about such a deep question. Hence, the only advice I am able to provide is a comment of my former professor: "The only way to learn quantum mechanics is to repeat the math over and over. You stop when you have forgotten your initial questions." Jun 21 '20 at 13:03
• Does this answer your question? Why is $|\Psi|^2$ the probability density? Jun 21 '20 at 13:39