24/12/24
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Q)How to read data from the keyboard into a Java application?
=>By using the library methods of Scanner class.
Q)An application runs on which cycle?
 =>IPO(Input Process Output)

The sum of 10 and 30 is 40


Q)Develop a Java application to perform the addition of two numbers.

//Addition.jav	a
import java.util.Scanner;
class Addition{
   public static void main(String args[]){
       Scanner scanner=new Scanner(System.in);
       System.out.println("Enter the first number:");
       int n1=scanner.nextInt();//scanner.nextInf();
       System.out.println("Enter the second number:");
       int n2=scanner.nextInt();
       int sum=n1+n2;//Processing 
       System.out.println("The sum of"+n1+"and"+ n2 +"is "+sum);
  }
}
Note:- "+" operator acts as string concatination operator as well as
arithmetic addition operator.
=>When both the operands are numbers, "+" acts as arithmetic addition operator.
=>When atleast one operand is a string, it acts as a string concatination operator.


Q)What is an operator? How are operators classified?     

=>An operator is a symbol that acts upon data items known as operands in order
to process them.

=>There are 2 criteria for classifying operators.
        1)based on the number of operands they are acting upon, operators
	are of three types.
	         1)unary(acts upon single operand)
		 2)binary(acts upon 2 operands)
		 3)ternary operator (acts upon 3 operands)

=>On the basis of type of operation that they are performing, operators are
classified as follows.
            1)Arithmetic operators
	    2)Asignment operators
	    3)relational operators(comparision operaters)
            4)Logical operators   etc.