Java, adding arrays

Question

i am working on a program to add numbers using an array. I have completed a lot of it but am troubled at the last part adding the actual numbers in the code. Here is my code.

public static void main (String[] args) {
    Scanner input= new Scanner(System.in);
    System.out.println("Enter size of array");
    int n= input.nextInt();
    int[] x= new int[n];
    System.out.println("Enter Array nums");
    for(int i=0;i<n;i++){
        x[i]= input.nextInt(); 
    }
}

But am troubled at the last part ... that tells us so good as nothing... what exactly are you getting and what are you expecting....??? — ΦXocę 웃 Пepeúpa ツ
– ΦXocę 웃 Пepeúpa ツ, Commented Apr 14, 2016 at 15:23
sorry, i have ordered everything but don't know how to actually add the nums — J. Smith
– J. Smith, Commented Apr 14, 2016 at 15:25

Reenu · Accepted Answer · 2016-04-14 15:41:06Z

2

You just need to initial variable with 0 which will have a sum of all values and then while taking a input the values are added into the variable initialized for holding the total values in the same for loop. Given below is the code for the same.

public static void main(String args[]){

     Scanner input= new Scanner(System.in);
       System.out.println("Enter size of array");
        int n= input.nextInt();
        int[] x= new int[n];
        System.out.println("Enter Array nums");
        int total=0;
        for(int i=0;i<n;i++){
            x[i]= input.nextInt(); 
            total=total+x[i];
        }
        System.out.println("total"+total);
}

answered Apr 14, 2016 at 15:41

Reenu

911 silver badge6 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

MikeCAT · Accepted Answer · 2016-04-14 15:27:25Z

1

Why not just write some code to add numbers?

import java.util.Scanner;
class X {
    public static void main (String[] args) {
        Scanner input= new Scanner(System.in);
        System.out.println("Enter size of array");
        int n= input.nextInt();
        int[] x= new int[n];
        System.out.println("Enter Array nums");
        for(int i=0;i<n;i++){
            x[i]= input.nextInt();
        }
        int sum = 0;
        for(int i=0;i<n;i++){
            sum+= x[i];
        }
        // to print the result, uncomment the line below
        //System.out.println(sum);
    }
}

answered Apr 14, 2016 at 15:27

MikeCAT

75.1k11 gold badges50 silver badges71 bronze badges

7 Comments

Andrew Over a year ago

why don't you do += in the first for?

MikeCAT Over a year ago

@AndrewTobilko Because There are no need of adding numbers other than 1 (in i++) in the first for.

J. Smith Over a year ago

@AndrewTobilko Thank You very much. That was exactly what I couldn't understand how to do. Never realized how simple the code was, (I overthought it). :)

Andrew Over a year ago

sum += (x[i] = input.nextInt()) looks prettier than yours

MikeCAT Over a year ago

@AndrewTobilko Then, why do you need the array... because the question says "using an array"? Let's throw away x and just use sum += input.nextInt();

|

Rabbit Guy · Accepted Answer · 2016-04-14 15:27:50Z

1

here is a method that will add up your array for you:

public int totalArray(int[] someArray) {
    int reply = 0;
    for (int value : someArray) reply += value;
    return reply;
}

answered Apr 14, 2016 at 15:27

Rabbit Guy

1,8923 gold badges18 silver badges29 bronze badges

Collectives™ on Stack Overflow

Java, adding arrays

3 Answers 3

Comments

7 Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

3 Answers 3

Comments

7 Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related