Java Program to find the sum of array elements.

Get array size n and n elements of array, then compute sum of the elements.

Sample Input 1:

5 5 7 9 3 1

Sample Output 1:


Program or Solution


Program Explanation

Array is a Collection of data with same type.

1. Get the size of the Array

2. Create a array with the given size (Array has 0 to size-1 index to access every location)

        0                        1                        2                         3                ......                size-2                  size-1


Here i starts at 0, incremented by 1 at every iteration and finally iteration stops when i is equal to size.


In First iteration i is 0, so a[i] is a[0]

In second iteration i is 1, so a[i] is a[1]


In last iteration i is size-1, so a[i] is a[size-1]

the input statement nextInt() reads input and stores in array location consecutively. like a[0], a[1], a[2].....

The second For Loop

sums the values of array consecutively like 

sum = sum + a[i]

sum = sum + a[0] in first iteration

sum = sum + a[1] in second iteration


sum = sum + a[size-1] in last iteration

Finally prints the value of sum.

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