Why is it concatenating instead of arithmetic operation?

Question

Scanner sal = new Scanner(System.in);
System.out.print("Enter first_salary: ");
int Salary1 = sal.nextInt();

System.out.print("Enter second_salary : ");
int Salary2 = sal.nextInt();

System.out.print("Combined Salary is " + Salary1 + Salary2);

I am trying to get user input twice, and then print the sum. Instead, the output is concatenating the numbers instead of actually adding them.

Answer 1

Because the + operator associates left to right. Your argument is equivalent to the explicit

(("Combined Salary is " + Salary1) + Salary2)

Since ("Combined Salary is " + Salary1) results in a string, you will concatenate strings. To group differently, adjust the order of operations with parentheses:

System.out.print("Combined Salary is " + (Salary1 + Salary2));