Day:38-While loop practice 4

Example1:[TBD] package While; public class Eaten { public static void main(String[] args) { int total=8; int count=1; while (count

May 7, 2025 - 12:13

Example1:[TBD]

package While;

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

    int total=8;
    int count=1; 

    while (count<=3) {
        eaten = total/2;
        total=total+eaten;
        count+=1;
    } 
    System.out.println(total);
    }

}

Example2:

package While;

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

    int no = 120;
    int div = 1;
    int count_of_divisors = 0;
    while (div<=no) {
        if(no%div == 0)
          { 
            //System.out.println(div);

            count_of_divisors+=1;
           }
        div+=1;
    }
System.out.println(count_of_divisors);
    }

}

output:
16

Example3:

package While;

public class Div2 {
    public static void findDivisors(int no) {
        int div = 2;
        int countOfDivisors = 0;

        while (div < no) {
            if (no % div == 0) {
                System.out.println(div);
                countOfDivisors++;
            }
            div++;
        }

        System.out.println(countOfDivisors);
    }

    public static void main(String[] args) {
        findDivisors(17);
    }

}

output:
0

Example4:

package While;

public class Div3 {
        public static boolean checkPrime(int no) {
            int countOfDivisors = 0;

            for (int div = 2; div < no; div++) {
                if (no % div == 0) {
                    System.out.println(div);
                    countOfDivisors++;
                }
            }

            if (countOfDivisors == 0) {
                return true;  // It's a prime number
            }
            return false;     // Not a prime number
        }

        public static void main(String[] args) {
            boolean result = checkPrime(120);

            if (result) {
                System.out.println("Prime Number");
            } else {
                System.out.println("Not Prime Number");
            }
        }


}

output:
2
3
4
5
6
8
10
12
15
20
24
30
40
60
Not Prime Number

Example5:

package While;

public class Box {  

        public static void main(String[] args) {
            double box = 1024;
            int securityCount = 0;

            while (box > 1) {
                box = box / 2;
                securityCount++;
            }

            System.out.println(securityCount);
        }



}

output:
10

Different between / and // in python

/ — Floating-point division
// — Floor division (Integer division)

/ — Floating-point division Always returns a float, even if the division is exact. Example:

print(10 / 2)   # Output: 5.0 (float)
print(7 / 2)    # Output: 3.5

// — Floor division (Integer division)
Returns the largest integer less than or equal to the result.[TBD]
Can return int or float depending on operands.
It truncates the decimal part.[TBD] Example:

print(10 // 2)  # Output: 5
print(7 // 2)   # Output: 3
print(-7 // 2)  # Output: -4 (floors toward negative infinity)