JAVA Practice Set 2

QUESTIONS - 

Q1 - What will be the result of the following expression --- float f = 7/4 * 9/2. 

Q2 - Write a JAVA program to encrpyt a grade by adding 8 to it. Decrypt it to show correct 
        grade.
Q3 - Use Comparison Operators to find out whether a given number is greater than the user 
        entered number or not.
Q4 - Write the following expression in a JAVA program --- v^2-u^2/2as. 
Q5 - Find the value of the following expression --- int x = 7*49/7+35/7 . 

CODE - 
package com.company;
import java.util.Scanner;
public class PS2 {
    public static void main(String[] args) {
//        Practice Set 2

/* Q1 - What will be the result of the following expression
        float f = 7/4 * 9/2 */
        float f = 7/4f * 9/2f;
        System.out.println(f);

/* Q2 - Write a JAVA program to encrpyt a grade by adding 8 to it.
        Decrypt it to show correct grade.       */
        char grade = 'B';
        grade  = (char)(grade+8); //Encrypting the grade
        System.out.println(grade);
        grade = (char)(grade-8); //Decrypting the grade
        System.out.println(grade);

/* Q3 - Use Comparison Operators to find out whether a given number is greater
        than the user entered number or not.    */
        System.out.println("Input the number ------");
        Scanner inp = new Scanner(System.in);
        int b = inp.nextInt();
        System.out.println(b>8);

/* Q4 - Write the following expression in a JAVA program --- v^2-u^2/2as       */
        System.out.println("Input the values----");
        float v = inp.nextFloat();
        float u = inp.nextFloat();
        float a = inp.nextFloat();
        float s = inp.nextFloat();
        float formula = (((v*v)-(u*u))/(2*a*s));
        System.out.println(formula);

/* Q5 - Find the value of the following expression --- int x = 7*49/7+35/7     */
        int x = 7*49/7+35/7;
        System.out.println(x);
    }
}