Why does the for loop work despite false?

Question

Java

public class JavaApplication33 {

    public static void main(String[] args) {
        int i, j;
        boolean b;
        
        for( i = 2;  i < 100;  i++) {
            b = true;
            
            //проверить, делится ли число без остатка
            for ( j = 2;  j <= i / j   ; j++)
                
                //если число делится без остатка, значит, оно не простое
                if( ( i % j ) ==  0 ) b = false;
            
            if (b)
                System.out.println( i + " - простое число" );
        }
    }
    
}

I'm learning java, the solution is copied from Schildt's textbook, questions about the second cycle
Let's say the number i = 7, and j = 3, the for loop according to the conditions ( j <= i / j ) must be false (because 3 <= 7/ 3 is logically wrong), but j still continues to increase according to the iteration, although the loop should have stopped executing, why is that?

Answer 1

because the assignment b=false itself does not cancel the loop, you need to do a break