In Java you can make choices with a switch-statement. Actually, you ask the computer something.
theory
- start with switch: switch + ( + variable + ) + {
- For the first question: case + value + : + break;
case 1:
// you end up here when the variable is 1
break;
- For the second question use: case + value + : + break;
case 2:
// you end up here when the variable is 2
break;
- (OPTIONAL) If the variable doesn’t equal the above values: default:
default:
//you end up here when it doesn't equal the variable
- close the statement with a }
EXAMPLE 1
package Switch;
import java.util.Scanner;
public class Switch {
void start() {
Scanner in = new Scanner(System.in);
int i = in.nextInt();
switch (i) {
case 1 - 2:
System.out.println("number is 1 or 2");
break;
case 4:
System.out.println("number is 4");
break;
case 5:
System.out.println("number is 5");
break;
default:
System.out.println("no option");
}
}
public static void main(String[] args) {
new Switch().start();
}
}
example 2
package Switch;
import java.util.Scanner;
public class Switch {
void start() {
Scanner in = new Scanner(System.in);
int i = in.nextInt();
switch (i) {
case 1:
case 2:
System.out.println("number is 1 or 2");
break;
case 4:
System.out.println("number is 4");
break;
case 5:
System.out.println("number is 5");
break;
default:
System.out.println("no option");
}
}
public static void main(String[] args) {
new Switch().start();
}
}
example 3
package Switch;
import java.util.Scanner;
public class Switch {
void start() {
Scanner in = new Scanner(System.in);
int i = in.nextInt();
switch (i) {
case 1: case 2:
System.out.println("number is 1 or 2");
break;
case 4:
System.out.println("number is 4");
break;
case 5:
System.out.println("number is 5");
break;
default:
System.out.println("no option");
}
}
public static void main(String[] args) {
new Switch().start();
}
}
SWITCH- VS IF/ELSE STATEMENT