public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
System.out.println("1 - login");
System.out.println("2 - regrister");
int firstSelection = scanner.nextInt();
while(firstSelection > 2 || firstSelection <1) {
System.out.println(firstSelection+" is not a valid entry");
int firstSelection = scanner.nextInt();
}
System.out.println("you picked "+firstSelection);
}
Issue:
duplicate variable firstSelection
What I'm trying to do:
What I tried:
System.out.println("1 - login");
System.out.println("2 - regrister");
boolean fs;
while((fs = scanner.nextInt() != 1) || (fs = scanner.nextInt() != 2)) {
System.out.println(fs+" is not a valid entry");
}
System.out.println("you picked "+fs);
Issue:
if i enter 1. I get no printline saying you picked 1
. If i enter it again it tells me true is not a valid entry
.
if i enter a incorrect response it will continualy respond true is not a valid entry
public static void main(String[] args) {
int firstSelection;
Scanner scanner = new Scanner(System.in);
while (true) {
System.out.println("1 - login");
System.out.println("2 - regrister");
firstSelection = scanner.nextInt();
if (firstSelection == 1 || firstSelection == 2)
break;
else {
System.out.println(firstSelection + " is not a valid entry");
System.out.println("---------------------");
}
}
System.out.println("you picked " + firstSelection);
}
You can Use the do-while loop also
`do{
//your code here
}while(condition)`
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.