Modulus of a Complex Number

Consider the complex number $$z = 3 + 4i$$, where $$i$$ is the imaginary unit defined by $$i^2 = -1$$.

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

The modulus of a complex number $$a + bi$$ is calculated using the formula:

$$|z| = ext{sqrt}(a^2 + b^2)$$