[Hacker Rank]: Simple Array Sum solved ✓

Author: Gonzalo Diaz

algorithm-exercises-java/src/main/java/ae/hackerrank/SimpleArraySum.java

@@ -0,0 +1,31 @@
+package ae.hackerrank;
+
+import java.util.List;
+
+/**
+ * Simple Array Sum.
+ *
+ * @link Problem definition [[docs/hackerrank/warmup/simple_array_sum.md]]
+ */
+public class SimpleArraySum {
+
+  private SimpleArraySum() {}
+
+  static java.util.logging.Logger logger = util.CustomLogger.getLogger();
+
+  /**
+   * simpleArraySum.
+   */
+  public static int simpleArraySum(List<Integer> ar) {
+    int total = 0;
+
+    for (Integer name : ar) {
+      total += name;
+    }
+
+    String log = String.format("simpleArraySum solved: %d", total);
+    logger.info(log);
+
+    return total;
+  }
+}

algorithm-exercises-java/src/test/java/ae/hackerrank/SimpleArraySumTest.java

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+package ae.hackerrank;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+import java.util.Arrays;
+import java.util.List;
+import org.junit.jupiter.api.Test;
+
+
+class SimpleArraySumTest {
+
+  @Test void testSimpleArraySum() {
+
+    Integer answer = 5;
+    List<Integer> ar = Arrays.asList(2, 3);
+
+    Integer solutionFound = SimpleArraySum.simpleArraySum(ar);
+
+    assertEquals(answer, solutionFound,
+        String.format("Problem 0000 answer must be: %d", answer)
+    );
+  }
+}

docs/hackerrank/warmup/simple_array_sum.md

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+# [Simple Array Sum](https://www.hackerrank.com/challenges/simple-array-sum/problem)
+
+Difficulty: #easy
+Category: #warmup
+
+Given an array of integers, find the sum of its elements.
+For example, if the array $ ar = [1, 2, 3], 1 + 2 + 3 = 6 $, so return $ 6 $.
+
+## Function Description
+
+Complete the simpleArraySum function in the editor below. It must return the sum
+ of the array elements as an integer.
+simpleArraySum has the following parameter(s):
+
+- ar: an array of integers
+
+## Input Format
+
+The first line contains an integer, , denoting the size of the array.
+The second line contains  space-separated integers representing the array's elements.
+
+## Constraints
+
+$ 0 < n, ar[i] \leq 1000 $
+
+## Output Format
+
+Print the sum of the array's elements as a single integer.
+
+## Sample Input
+
+```text
+6
+1 2 3 4 10 11
+```
+
+## Sample Output
+
+```text
+31
+```
+
+## Explanation
+
+We print the sum of the array's elements: $ 1 + 2 + 3 + 4 + 10 + 11 = 31 $.