Input n numbers into an array and add all the elements using java

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package com.array.java;
import java.util.Scanner;

public class Add_element {

        public static void main(String[] args) {
        int size,i,sum=0;
        Scanner Sc=new Scanner(System.in);
        System.out.println("enter array size\n");
        size=Sc.nextInt( );
        int arr[]=new int[100];
        System.out.println("enter array elements\n");
        for(i=0;i<size;i++)
		{
			arr[i]=Sc.nextInt();
			sum=sum+arr[i];
		}
        
        System.out.println("sum of the array:"+sum);

	}

}

Line-1:

❖ Package com.array.java;

It is a java package( com.array.java) which is a collection of classes and this package is created in a java project .

Line-2:

❖ import java.util.Scanner;

Scanner is a class in java. util package used for obtaining the input of the primitive types like int, double, etc. and strings .

Line-4:

❖ public class Add_element{

*Here class Add_element is defined as a class which is a template used to create objects and to define object data types and methods .

>–and it’s defined as public because it can be accessed anywhere .

Line-6:

❖ public static void main(String[] args)

>>– it is a main method in which we can execute a program //public :it is an access modifier of the main function which must be public so that the JVM which is (Java Virtual Machine)can access and execute this method.

//If a method is not public, then access is restricted and its showing error //static is a keyword in which main method has must to be static in which JVM can load the class into memory and call the main method without creating an instance

//void it means no return type

//main() is function string[]args : string means collection of characters ,String[] args represents a collection of Strings that are separated by a space and can be typed into the program on the terminal directly.

Line-7:

❖ int size,i,sum=0;

>>it means we declare the size,no and the sum is equal to 0.

Line-8:

❖ Scanner sc=new Scanner(System.in);

>>–it means here scanner is a class and Sc is the instance of the object which is new Scanner.System.in is an argument

Line-9:

❖ System.out.println(“Enter array size:\n “);

>>– it means System is a class name and out is an instance of the System println is print a new line .

Line-10:

size]=sc.nextInt();

>>– here i is a variable that we take and Sc is our instance name which is created for an object and nextInt() is a method method of a Scanner object that reads in a string of digits or char and converts them into an int type.

Line-11:

❖ int arr[ =new int[100] ;

>>– here we declare array size and initialise the array element which is integer type.

Line-12:

❖ System.out.println(“enter array Elements:\n”);

>>– it means System is a class name and out is an instance of the System println is print a new line .

Line-13:

❖ for(int i=0;i<size;i++) {

>>it means loop through the array by incrementing the value of i.

Line-15:

❖ arr[i]=Sc.nextInt();

Line-16: