Add Armstrong number checker and digit counting utility

Author: gourabofficial

Basic/Digits/amstrong.java

@@ -0,0 +1,29 @@
+
+import java.util.Scanner;
+
+public class amstrong {
+  
+  public static void main(String[] args) {
+    Scanner sc = new Scanner(System.in);
+    System.out.print("Enter the number for Check amstrong: " );
+    int num = sc.nextInt();
+
+
+    if (check_amstrong(num)) {
+      System.out.println("Yes,Its amstrong Number");
+    } else {
+      System.out.println("Not amstrong Number");
+    }
+  }
+  
+  static boolean check_amstrong(int num) {
+    int originalNum = num;
+    int sum = 0;
+    while (num != 0) {
+      int digit = num % 10;
+      sum += (digit * digit * digit);
+      num = num / 10;
+    }
+    return sum == originalNum;
+  }
+}

Basic/Digits/count_digits.java

@@ -0,0 +1,42 @@
+
+public class count_digits {
+
+  public static void main(String[] args) {
+    int number = 123456710;
+
+    int result = coutDigits(number);
+    System.out.println("The digits  : " + result);
+
+    int lastDigit = lastDigit(number);
+    System.out.println("the last digit is : " + lastDigit);
+
+    int sum = sumOfDigit(number);
+    System.out.println("The sum: " + sum);
+
+  }
+
+  static int coutDigits(int n) {
+    int count = 0;
+    while (n != 0) {
+      n = n / 10;
+      count++;
+    }
+    return count;
+  }
+
+  static int lastDigit(int num) {
+    return num % 10;
+  }
+
+  static int sumOfDigit(int num) {
+    int sum = 0;
+    while (num != 0) {
+       int digit = num % 10;
+       sum += digit;
+      //  System.out.println("1st: " +num);
+       num = num / 10;
+      //  System.out.println( "2nd " + num);
+      }
+    return sum;
+  }
+}