How output is 35

Question

class Program {
public static void main(String[]args){

int a=1,int f=5;
for(;(a+=f+1)<7);)
f=a%(f+1);
System.out.print(f*a)
}
}

Answer 1

The value of a becomes 7 as
a+=f+1 i.e. a = a + f + 1 = 1 + 5 + 1 = 7

But the value of f doesn't change because loop doesn't execute as the condition becomes false in for loop.

So, the product f*a gets printed i.e. 35.

Answer 2

thanks #amit