Array Sum

Namachila November 20, 2025

0 6 2 minutes read

What is Array Sum?

In context of Computer Science, array sum is defined as the sum of all the elements in an array. Suppose you have an array ARR[]={a1, a2, a3…, an}, let ArrSum be the array sum of this array, then by defination:

ArrSum= a1 + a2 + a3 +…+ an

Practice problems related to Array Sum:

Problem	Difficulty
Program to find sum of elements in a given array	Easy
Sum of array elements using recursion	Easy
Suffix Sum Array	Easy
Sum of array elements after reversing each element	Easy
Prefix Sum Array	Easy
Construct sum-array with sum of elements in given range	Medium
Sum of array elements that is first continuously increasing	Medium
Maximizing array sum with given operation	Medium
Find Sum of all unique sub-array sum for a given array.	Medium
Calculate sum of the array generated by given operations	Medium
Find an element in array such that sum of left array is equal …	Medium
Sum of all elements in an array between zeros	Medium
Sum of the updated array after performing the given …	Medium
A Sum Array Puzzle	Medium
Replace every element of array with sum of elements on its …	Medium
Find Subarray with given sum \| Set 1 (Non-negative ..	Medium
Sum of all Subarrays \| Set 1	Medium
Check if pair with given Sum exists in Array (Two Sum)	Medium
Count array elements having sum of digits equal to K	Medium
Sum of an array of large numbers	Hard
Sum of elements in given range from Array formed by …	Hard
Minimum operations to make Array sum at most S from …	Hard
Find a triplet that sum to a given value (3sum)	Hard

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Last Updated :
16 Oct, 2023