optimization for perfect number (#123)

realDuYuanChao · web-flow · commit 1011f252a144 · 2021-05-21T19:30:15.000+08:00
diff --git a/src/main/java/com/examplehub/maths/PerfectNumber.java b/src/main/java/com/examplehub/maths/PerfectNumber.java
@@ -14,7 +14,7 @@ public static boolean isPerfectNumber(int number) {
       return false; /* all negative is not perfect number */
     }
     int sum = 0;
-    for (int i = 1; i < number / 2 + 1; ++i) {
+    for (int i = 1; i <= number / 2; ++i) {
 
       if (number % i == 0) {
         sum += i;

Original file line number	Diff line number	Diff line change
`@@ -14,7 +14,7 @@ public static boolean isPerfectNumber(int number) {`
`14`	`14`	`return false; /* all negative is not perfect number */`
`15`	`15`	`}`
`16`	`16`	`int sum = 0;`
`17`		`- for (int i = 1; i < number / 2 + 1; ++i) {`
	`17`	`+ for (int i = 1; i <= number / 2; ++i) {`
`18`	`18`
`19`	`19`	`if (number % i == 0) {`
`20`	`20`	`sum += i;`