702730. Sum of Array
Here is the detailed Markdown blog post for the "Sum of Array" problem:
Sum of Array Slug: sum-of-array2326 Difficulty: Basic Id: 702730 Topic Tags: Arrays, Data Structures Company Tags: None
Summary
The problem involves calculating the sum of an array. Given a numerical array, write a program to calculate its total sum. This problem is based on basic data structures and algorithms.
Detailed Explanation
To solve this problem, we can use a simple algorithm that iterates through each element in the array and adds them up. Here's a step-by-step breakdown of the solution:
- Start with an initialized variable
sumset to 0. - Iterate through each element
arr[i]in the array. - For each iteration, add the current element
arr[i]to thesum. - After the loop finishes, return the final value of
sum.
The time complexity for this algorithm is O(n), where n is the size of the input array, since we need to iterate through each element once. The space complexity is O(1), as we only use a single variable to store the sum.
Here's a pseudocode representation of the solution:
public int sumArray(int[] arr) {
int sum = 0;
for (int i : arr) {
sum += i;
}
return sum;
}