Problem Description
Find prefix Array Sum of a given array. Prefix Sum Array
Solution
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package com.arrays;
import java.util.Arrays;
public class PrefixSum {
public static void main(String[] args) {
int[] arr = {10, 20, 10, 5, 15};
System.out.println(Arrays.toString(getPrefixSumArray(arr)));
}
public static int[] getPrefixSumArray(int[] arr) {
int[] prefixArray = new int[arr.length];
prefixArray[0] = arr[0];
for(int i=1; i<prefixArray.length; i++) {
prefixArray[i] = prefixArray[i-1] + arr[i];
}
return prefixArray;
}
}