i must create a public static boolean factor(int x, int y) function using public

Question

i must create a public static boolean factor(int x, int y) function

using

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

public static int add(int x, int y) {
int result = x + y;
return result;
}

public static int sub(int x, int y) {
assert (x >= y);
int result = x - y;
return result;
}

public static int mult(int x, int y) {
if (x == 0 || y == 0) {
return 0;
} else {
int prod = 0;

while (x > 0) {
prod = add(prod, y);
x = sub(x, 1);
}

return prod;
}
}

i cannot use any operators, i have to implement the functions above to get it. Hope someone can help me, thanks.

Explanation / Answer

    public static int factor(int count) {
        int factor = 1;
        for (int i = 1; i <= count; i++) {
            factor = mult(factor, i);
            System.out.println(i + "! = " + factor);
        }
        return factor;
    }

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