What is the difference between 0. vs 0.0 in shaders?

Question

When reading example code for a raymarching shader, I noticed that the author uses 0.. Later in the code, they also use 0.0. Are these the same thing, or is there a convention that I'm missing?

Answer 1

There is no difference and no convention mandating one over the other, it's just a matter of personal preference / consistency.