Simple Adding

ardallie · ardallie · commit 131c9b59abd5 · 2021-08-15T12:44:41.000+01:00
diff --git a/src/easy/SimpleAdding.java b/src/easy/SimpleAdding.java
@@ -0,0 +1,33 @@
+package easy;
+
+/**
+ * Have the function SimpleAdding(num) add up all the numbers from 1 to num.
+ * For example: if the input is 4 then your program
+ * should return 10 because 1 + 2 + 3 + 4 = 10.
+ * For the test cases, the parameter num will be any number from 1 to 1000.
+ */
+public class SimpleAdding {
+
+  /**
+   * Simple Adding function.
+   *
+   * @param num input number
+   * @return the sum of numbers
+   */
+  private static int simpleAdding(int num) {
+    return num * (num + 1) / 2;
+  }
+
+  /**
+   * Entry point.
+   *
+   * @param args command line arguments
+   */
+  public static void main(String[] args) {
+    var result1 = simpleAdding(100);
+    System.out.println(result1);
+    var result2 = simpleAdding(8);
+    System.out.println(result2);
+  }
+
+}
