What is the meaning of the following code? I have asked my questions in code bit in the form of comments .

Question

https://code.sololearn.com/cL3HW8sXjypW/?ref=app

Answer 1

If statement excutes when the condition is true
In your code
y%z is 0 it means false
That's why if statement doesn't excute and else statement does

You can test by changing the value of z to 5
so,y%z =1 and the condition of the if statement becomes true
then the output will be 4

Answer 2

6%3 = 0 (no remainder)
0 evaluates to false, as the condition is false, the else-part is printed

Answer 3

Truth value of 0 is false. And otherthan 0 is treated as true so y%z determines truthvalue value there.

cout<<--x; pre decrement condition so first value is decreased then printed

cout<<x--; post decrement condition so first value is used or printed then after decreased.

For more details, se pre/post increment/decrement operators..
Hope it helps..