Consider the complex number $$z = 3 - 4i$$.

What is the modulus of the complex number $$z$$?

The modulus of a complex number $$z = a + bi$$ is given by the formula: $$|z| = \sqrt{a^2 + b^2}$$, where $$a$$ is the real part and $$b$$ is the imaginary part of the complex number.