Using a not equal operator in Strings

Question

I am trying to make a program that inputs the user's name and age and then asks the user on what info he/she wants to know. Here's the program :

import java.util.Scanner; public class name_and_age { static Scanner key = new Scanner(System.in); public static void main(String args[]) { String name = "NAME"; String age = "AGE"; System.out.println("What is your name?"); String a = key.nextLine(); System.out.println("What is your age?"); int b = key.nextInt(); while() { System.out.println("What do you want to know?"); String i = key.nextLine(); if(i.equals(name)) { System.out.println("Your name is "+ a); } if(i.equals(age)) { System.out.println("Your age is" + b); } else { System.out.println("Please either enter age or name"); } } } }

I am confused on what to put in the while loop because I want something like
while( (i.equals(name)) || (i.equals(age)) ) except that I want to put not equals in the place of equals. What should I do?

while(( ! i.equals(name)) || (! i.equals(age))) the ! is a not operator — c0der
– c0der, Commented Oct 14, 2018 at 11:25
You should format your code properly when posting it to StackOverflow — MC Emperor
– MC Emperor, Commented Oct 14, 2018 at 18:18

Chai T. Rex · Accepted Answer · 2018-10-14 16:44:46Z

To put not-equals, you use:

(!string1.equals(string2))

Note the ! in front. That turns whatever follows into the negation of whatever follows. ! true will be false and ! false will be true.

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