switch statement problem

Question

package voting_age_using_switch_statement;
import javax.management.Attribute;
import java.util.Scanner;
public class voting_age_using_switch_statement
{
public static void main(String[] args)
{
System.out.println("enter your ");
Scanner scanner1 = new Scanner(System.in);
int marks = scanner1.nextInt() ;
switch (marks)
{
int x = marks /100;

case 1 ( =>100 && >90 )
System.out.println("excellent thats ");
System.out.print(x);
System.out.print("accuracy");
break;
case 2 ( =>89 && >=79 )
System.out.println("good!! but can be better ");
System.out.print(x);
System.out.print("% accuracy");
break;
case 3 ( >=78 && >=69 )
System.out.println("obove average thats ");
System.out.print(x);
System.out.print("% accuracy");
break;
case 4 ( >=68 && >=59 )
System.out.println("average ");
System.out.print(x);
System.out.print("accuracy");
break;
case 5 ( >= 58 && >= 49 )
System.out.println("excellent thats ");
System.out.print(x);
System.out.print("accuracy");
break;
case 6 ( >=48 && >= 39 )
System.out.println("you barely passed ");
System.out.print(x);
System.out.print("accuracy");
break;
case 7 ( >= 38 && >= 29 )
System.out.println("excellent that’s a failure ");
System.out.print(x);
System.out.print("accuracy");
break;
case 8 ( >= 28 && >= 19 )
System.out.println("excellent that’s a royal failure ");
System.out.print(x);

Answer 1

Instead of switch(...) {} use if..else if..else construct as it is more suitable for this type of question

int x = marks /100;

if(x>=100){
System.out.println("excellent thats ");
System.out.print(x);
System.out.print("accuracy");
}
else if(x>=90){
System.out.println("good!! but can be better ");
System.out.print(x);
System.out.print("% accuracy");
}
else if(x>=70){
System.out.println("obove average thats ");
System.out.print(x);
System.out.print("% accuracy");
}
else if(x>=60){
System.out.println("average ");
System.out.print(x);
System.out.print("accuracy");
}
else if(x>50){
System.out.println("excellent thats ");
System.out.print(x);
System.out.print("accuracy");
}
else if(x>=40){
System.out.println("you barely passed ");
System.out.print(x);
System.out.print("accuracy");
}
else if(x>30){
System.out.println("excellent that’s a failure ");
System.out.print(x);
System.out.print("accuracy");
else{
System.out.println("excellent that’s a royal failure ");
System.out.print(x);
}

Answer 2

you are confused how a switch statement works. it cant use boolean expressions like x >= 7

this is how it works

int x = 8;

switch (x) {
case 2:
x++;
break;
case 8:
x+=2
break;
}

case means what the value of the variable being switched is

since x is 8, it goes to case 8

Answer 3

what you are looking for are if else statements