What are the advantages of commas in conditional statements- What is the advantage of commas in a conditional statement?

problem ：

We can write an if statement as We could write one if Sentence as

if (a == 5, b == 6, ... , thisMustBeTrue)

and only the last condition should be satisfiable to enter the if body. And only the last condition can be met to enter if body .

why is it allowed? Why is it allowed ？

---

Solution ：

Reference resources ： https://stackoom.com/en/question/2Goyg