JavaDeclaration.java

public class JavaDeclaration {
	public static void main(String[] args) {
		int age; // create
		int birthYear=1994; // create and assign
		int currentYear= 2021;
		// call currentYear , call birthYear
		age = currentYear - birthYear;
		System.out.println("age"); //this is text
		System.out.println(age);
		// way1
		System.out.println("you are " +age+ " years old"); // we use double + 		
		System.out.println("you are going to be " +(age+1)+ " next year");
		System.out.println(age);
		// way2
		age = age +1 ;
		System.out.println(age);
		System.out.println("you are going to be " + age+ " next year");
		
		int n1, n2,n3;
		n1 = 15;
		n2 = 34;
		n3 = 78;
		System.out.println("1th variable " +n1);
		System.out.println("2nd variable " +n2);
		System.out.println("3rd variable " +n3);
		int sum= n1+n2+n3;
		System.out.println("the result is "+sum);
	}
}