What do these functions do in code?

Question

Algorithms

//------------------------------------------------ --------1
for ( int i=n1; !(n1 % i ==0 && n2 % i ==0); i--);
//------------------------------------------------ --------2
for ( int n=a; n%a!=0 || n%b!=0; n++);

Answer 1

1. Find "on the forehead" GCD and fuck it.
2. Find "on the forehead" NOC and send it there too.
I repeat, both functions are extremely inefficient, and their result goes nowhere. As soon as the control crosses the semicolon, the variable will disappear.

Answer 2

These "functions" loop over the variables i and n.