style: enable NeedBraces in checkstyle (#5227)

* enable style NeedBraces

* style: enable NeedBraces in checkstyle

---------

Co-authored-by: Samuel Facchinello <samuel.facchinello@piksel.com>

src/main/java/com/thealgorithms/maths/AliquotSum.java

@@ -34,7 +34,9 @@ public final class AliquotSum {
      * @return aliquot sum of given {@code number}
      */
     public static int getAliquotSum(int n) {
-        if (n <= 0) return -1;
+        if (n <= 0) {
+            return -1;
+        }
         int sum = 1;
         double root = Math.sqrt(n);
         /*
@@ -53,7 +55,9 @@ public final class AliquotSum {
         }
         // if n is a perfect square then its root was added twice in above loop, so subtracting root
         // from sum
-        if (root == (int) root) sum -= root;
+        if (root == (int) root) {
+            sum -= root;
+        }
         return sum;
     }
 }

src/main/java/com/thealgorithms/maths/AutomorphicNumber.java

@@ -22,7 +22,9 @@ public final class AutomorphicNumber {
      *         {@code false}
      */
     public static boolean isAutomorphic(long n) {
-        if (n < 0) return false;
+        if (n < 0) {
+            return false;
+        }
         long square = n * n; // Calculating square of the number
         long t = n;
         long numberOfdigits = 0;
@@ -42,7 +44,9 @@ public final class AutomorphicNumber {
      *         {@code false}
      */
     public static boolean isAutomorphic2(long n) {
-        if (n < 0) return false;
+        if (n < 0) {
+            return false;
+        }
         long square = n * n; // Calculating square of the number
         return String.valueOf(square).endsWith(String.valueOf(n));
     }
@@ -56,7 +60,9 @@ public final class AutomorphicNumber {
      */
     public static boolean isAutomorphic3(String s) {
         BigInteger n = new BigInteger(s);
-        if (n.signum() == -1) return false; // if number is negative, return false
+        if (n.signum() == -1) {
+            return false; // if number is negative, return false
+        }
         BigInteger square = n.multiply(n); // Calculating square of the number
         return String.valueOf(square).endsWith(String.valueOf(n));
     }

src/main/java/com/thealgorithms/maths/HarshadNumber.java

@@ -14,7 +14,9 @@ public final class HarshadNumber {
      *         {@code false}
      */
     public static boolean isHarshad(long n) {
-        if (n <= 0) return false;
+        if (n <= 0) {
+            return false;
+        }
 
         long t = n;
         long sumOfDigits = 0;
@@ -35,7 +37,9 @@ public final class HarshadNumber {
      */
     public static boolean isHarshad(String s) {
         final Long n = Long.valueOf(s);
-        if (n <= 0) return false;
+        if (n <= 0) {
+            return false;
+        }
 
         int sumOfDigits = 0;
         for (char ch : s.toCharArray()) {

src/main/java/com/thealgorithms/maths/KaprekarNumbers.java

@@ -16,11 +16,15 @@ public final class KaprekarNumbers {
     // Provides a list of kaprekarNumber in a range
     public static List<Long> kaprekarNumberInRange(long start, long end) throws Exception {
         long n = end - start;
-        if (n < 0) throw new Exception("Invalid range");
+        if (n < 0) {
+            throw new Exception("Invalid range");
+        }
         ArrayList<Long> list = new ArrayList<>();
 
         for (long i = start; i <= end; i++) {
-            if (isKaprekarNumber(i)) list.add(i);
+            if (isKaprekarNumber(i)) {
+                list.add(i);
+            }
         }
 
         return list;

src/main/java/com/thealgorithms/maths/MillerRabinPrimalityCheck.java

@@ -20,7 +20,9 @@ public final class MillerRabinPrimalityCheck {
      */
 
     public static boolean millerRabin(long n, int k) { // returns true if n is probably prime, else returns false.
-        if (n < 4) return n == 2 || n == 3;
+        if (n < 4) {
+            return n == 2 || n == 3;
+        }
 
         int s = 0;
         long d = n - 1;
@@ -31,13 +33,17 @@ public final class MillerRabinPrimalityCheck {
         Random rnd = new Random();
         for (int i = 0; i < k; i++) {
             long a = 2 + rnd.nextLong(n) % (n - 3);
-            if (checkComposite(n, a, d, s)) return false;
+            if (checkComposite(n, a, d, s)) {
+                return false;
+            }
         }
         return true;
     }
 
     public static boolean deterministicMillerRabin(long n) { // returns true if n is prime, else returns false.
-        if (n < 2) return false;
+        if (n < 2) {
+            return false;
+        }
 
         int r = 0;
         long d = n - 1;
@@ -47,8 +53,12 @@ public final class MillerRabinPrimalityCheck {
         }
 
         for (int a : new int[] {2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37}) {
-            if (n == a) return true;
-            if (checkComposite(n, a, d, r)) return false;
+            if (n == a) {
+                return true;
+            }
+            if (checkComposite(n, a, d, r)) {
+                return false;
+            }
         }
         return true;
     }
@@ -66,10 +76,14 @@ public final class MillerRabinPrimalityCheck {
      */
     private static boolean checkComposite(long n, long a, long d, int s) {
         long x = powerModP(a, d, n);
-        if (x == 1 || x == n - 1) return false;
+        if (x == 1 || x == n - 1) {
+            return false;
+        }
         for (int r = 1; r < s; r++) {
             x = powerModP(x, 2, n);
-            if (x == n - 1) return false;
+            if (x == n - 1) {
+                return false;
+            }
         }
         return true;
     }
@@ -79,11 +93,14 @@ public final class MillerRabinPrimalityCheck {
 
         x = x % p; // Update x if it is more than or equal to p
 
-        if (x == 0) return 0; // In case x is divisible by p;
-
+        if (x == 0) {
+            return 0; // In case x is divisible by p;
+        }
         while (y > 0) {
             // If y is odd, multiply x with result
-            if ((y & 1) == 1) res = multiplyModP(res, x, p);
+            if ((y & 1) == 1) {
+                res = multiplyModP(res, x, p);
+            }
 
             // y must be even now
             y = y >> 1; // y = y/2

src/main/java/com/thealgorithms/maths/PascalTriangle.java

@@ -52,10 +52,11 @@ public final class PascalTriangle {
              */
             for (int i = 0; i <= line; i++) {
                 // First and last values in every row are 1
-                if (line == i || i == 0) arr[line][i] = 1;
-                // The rest elements are sum of values just above and left of above
-                else
+                if (line == i || i == 0) {
+                    arr[line][i] = 1;
+                } else {
                     arr[line][i] = arr[line - 1][i - 1] + arr[line - 1][i];
+                }
             }
         }
 

src/main/java/com/thealgorithms/maths/PerfectNumber.java

@@ -19,7 +19,9 @@ public final class PerfectNumber {
      * @return {@code true} if {@code number} is perfect number, otherwise false
      */
     public static boolean isPerfectNumber(int number) {
-        if (number <= 0) return false;
+        if (number <= 0) {
+            return false;
+        }
         int sum = 0;
         /* sum of its positive divisors */
         for (int i = 1; i < number; ++i) {
@@ -37,7 +39,9 @@ public final class PerfectNumber {
      * @return {@code true} if {@code number} is perfect number, otherwise false
      */
     public static boolean isPerfectNumber2(int n) {
-        if (n <= 0) return false;
+        if (n <= 0) {
+            return false;
+        }
         int sum = 1;
         double root = Math.sqrt(n);
 
@@ -58,7 +62,9 @@ public final class PerfectNumber {
 
         // if n is a perfect square then its root was added twice in above loop, so subtracting root
         // from sum
-        if (root == (int) root) sum -= root;
+        if (root == (int) root) {
+            sum -= root;
+        }
 
         return sum == n;
     }

src/main/java/com/thealgorithms/maths/SumWithoutArithmeticOperators.java

@@ -12,7 +12,9 @@ public class SumWithoutArithmeticOperators {
      */
 
     public int getSum(int a, int b) {
-        if (b == 0) return a;
+        if (b == 0) {
+            return a;
+        }
         int sum = a ^ b;
         int carry = (a & b) << 1;
         return getSum(sum, carry);