Question

4.​Assign to the variable sum the value of the algebraic expression below. Be careful to follow the order of operations! Assume sum and num are integers.

​num (num + 1)
​sum = ​------------------
​2




II​Assume the variable below are declared and initialized as shown:
​(1 point each) no calculators!
​int n, m;
​double x, y;
​n = 23; m = 5; x = 2.3; y = 4.5;
​

What is the value of each expression below?
​
1. n/m = _______ 2. n % m = ______ 3. 25 % m = _____ 4. m / n = ______
​
5.​n- x * 2 = _____ 6. y – x + m = _______ 7. (double)n / m =______

Answer 1

public class Question {
public static void main(String[] args) {
int num = 1;
int sum = num * (num + 1) / 2;

System.out.println(sum);

int n = 23;
int m = 5;

double x = 2.3;
double y = 4.5;

System.out.println(n / m);
System.out.println(n % m);
System.out.println(25 % m);
System.out.println(m / n);
System.out.println(n - x * 2);
System.out.println(y - x + m);
System.out.println((double) n / m);
}
}