style: enable MultipleVariableDeclarations in checkstyle (#5175)

Co-authored-by: vaibhav <vaibhav.waghmare@techprescient.com>

src/main/java/com/thealgorithms/conversions/AnyBaseToAnyBase.java

@@ -27,7 +27,8 @@ public final class AnyBaseToAnyBase {
     public static void main(String[] args) {
         Scanner in = new Scanner(System.in);
         String n;
-        int b1, b2;
+        int b1;
+        int b2;
         while (true) {
             try {
                 System.out.print("Enter number: ");
@@ -132,7 +133,8 @@ public final class AnyBaseToAnyBase {
         // Declare variables: decimal value of n,
         // character of base b1, character of base b2,
         // and the string that will be returned.
-        int decimalValue = 0, charB2;
+        int decimalValue = 0;
+        int charB2;
         char charB1;
         String output = "";
         // Go through every character of n

src/main/java/com/thealgorithms/conversions/AnytoAny.java

@@ -15,7 +15,9 @@ public final class AnytoAny {
         int sn = scn.nextInt();
         int sb = scn.nextInt();
         int db = scn.nextInt();
-        int m = 1, dec = 0, dn = 0;
+        int m = 1;
+        int dec = 0;
+        int dn = 0;
         while (sn != 0) {
             dec = dec + (sn % 10) * m;
             m *= sb;

src/main/java/com/thealgorithms/conversions/BinaryToDecimal.java

@@ -10,7 +10,10 @@ final class BinaryToDecimal {
     }
 
     public static long binaryToDecimal(long binNum) {
-        long binCopy, d, s = 0, power = 0;
+        long binCopy;
+        long d;
+        long s = 0;
+        long power = 0;
         binCopy = binNum;
         while (binCopy != 0) {
             d = binCopy % 10;

src/main/java/com/thealgorithms/conversions/BinaryToOctal.java

@@ -32,7 +32,8 @@ public final class BinaryToOctal {
      */
     public static String convertBinaryToOctal(int binary) {
         String octal = "";
-        int currBit = 0, j = 1;
+        int currBit = 0;
+        int j = 1;
         while (binary != 0) {
             int code3 = 0;
             for (int i = 0; i < 3; i++) {

src/main/java/com/thealgorithms/conversions/DecimalToBinary.java

@@ -24,7 +24,10 @@ final class DecimalToBinary {
      * conventional algorithm.
      */
     public static void conventionalConversion() {
-        int n, b = 0, c = 0, d;
+        int n;
+        int b = 0;
+        int c = 0;
+        int d;
         Scanner input = new Scanner(System.in);
         System.out.printf("Conventional conversion.%n Enter the decimal number: ");
         n = input.nextInt();
@@ -42,7 +45,10 @@ final class DecimalToBinary {
      * algorithm
      */
     public static void bitwiseConversion() {
-        int n, b = 0, c = 0, d;
+        int n;
+        int b = 0;
+        int c = 0;
+        int d;
         Scanner input = new Scanner(System.in);
         System.out.printf("Bitwise conversion.%n Enter the decimal number: ");
         n = input.nextInt();

src/main/java/com/thealgorithms/conversions/DecimalToOctal.java

@@ -18,7 +18,11 @@ public final class DecimalToOctal {
     // enter in a decimal value to get Octal output
     public static void main(String[] args) {
         Scanner sc = new Scanner(System.in);
-        int n, k, d, s = 0, c = 0;
+        int n;
+        int k;
+        int d;
+        int s = 0;
+        int c = 0;
         System.out.print("Decimal number: ");
         n = sc.nextInt();
         k = n;

src/main/java/com/thealgorithms/conversions/HexToOct.java

@@ -56,7 +56,8 @@ public final class HexToOct {
      */
     public static void main(String[] args) {
         String hexadecnum;
-        int decnum, octalnum;
+        int decnum;
+        int octalnum;
         Scanner scan = new Scanner(System.in);
 
         System.out.print("Enter Hexadecimal Number : ");