User defined array and the specific sum using a loop

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Take an array of user defined size and input all values from user that print sum of 1st and last element , sum of 2nd and 2nd last element , sum of 3rd and 3rd last element and so on if array has even size and if array size is odd than print the middle value as it is.using a loop. I need a code to this specific problem in java?

What I have tried:

Java

package try5;

import java.util.Scanner;

public class Try5 {

    public static void main(String[] args) {
    int length,sum = 0;
    Scanner  num= new Scanner(System.in);
    
    System.out.println("Enter the total numbers in an array:");
    length = num.nextInt();
    
    int[] array = new int[length];
    for(int i=0; i<length; i++){
        System.out.println("Values::");
        array[i] = num.nextInt();
    }
    
        for(int h=0; h<length; h++){
            
        for(int t=1; t>h; t--){
        sum = array[h]+array[length-t];
        System.out.println("sum:" +sum);
        sum = array[h+1]+array[length-t-1];
        System.out.println("sum:" +sum);}   
    }
}
}

Posted 4-Sep-17 0:45am

Member 13390616

Updated 4-Sep-17 1:26am

CPallini

v2

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Jochen Arndt · Accepted Answer · 2017-09-04T01:26:00

You don't need two loops. Just use one while loop with two variables:

Java

int first = 0;
int last = length - 1;
while (first <= last)
{
    if (first < last)
        System.out.printf("%d. sum: %d%n", first + 1, array[first] + array[last]);
    else
        System.out.printf("%d. mid: %d%n", first + 1, array[first]);
    first++;
    last--;
}

You might also use a for loop instead (iterating over the half length) and calculate the last index inside the loop:

Java

for (int first = 0; first < (length + 1) / 2; first++)
{
    int last = length - 1 - first;
    if (first < last)
        System.out.printf("%d. sum: %d%n", first + 1, array[first] + array[last]);
    else
        System.out.printf("%d. mid: %d%n", first + 1, array[first]);
}

OriginalGriff · Accepted Answer · 2017-09-04T01:07:00

Quote:
I need a code to this specific problem in java?

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User defined array and the specific sum using a loop

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