Merge pull request #1 from Raghav-Bhandari/Raghav-Bhandari-branch

Lucky Numbers

Hackerank/LuckyNumber.py

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+# CODE DESCRIPTION
+# A number is called lucky if the sum of its digits, as well as the sum of the squares of its digits is a prime number.
+# Through this python code we can find how many numbers between a and b inclusive, are lucky.
+
+# EXAMPLE
+# For example, a = 20 and b = 25 .
+
+# VALUE   SUM OF DIGITs     SQUARE OF DIGITS      SUM 
+#  20          2                  4,0              4
+#  21          3                  4,1              5
+#  22          4                  4,4              8
+#  23          5                  4,9              13
+#  24          6                  4,16             20
+#  25          7                  4,25             29
+
+# We see that three numbers 21, 23 and 25 are lucky.
+
+# Function that gives sum of digits of numbers
+def getSum(n):      
+    sum = 0
+    for digit in str(n):  
+      sum += int(digit)       
+    return sum
+
+# Function that gives sum of squares of digits of numbers
+def getSquareSum(n):      
+    SquareSum = 0
+    for digit in str(n):  
+      SquareSum += int(digit)*int(digit)       
+    return SquareSum
+
+# Function that check number is prime or not
+def checkPrime(number):
+    isPrime = False
+    if number == 2:
+        isPrime = True
+    if number > 2:
+        isPrime = True
+        for i in range(2, number):
+            if number % i == 0:
+                isPrime = False
+                break
+    return isPrime
+
+# Defining a function that returns all lucky numbers
+def lucky_number(a,b):
+# DECLARING EMPTY LISTS
+    # List to store sum and sum of squares of digits of numbers
+    FullList=[]
+
+    # List to store final lucky numbers
+    primeList=[]
+
+    # For loop to append sum and sum of squares of digits of numbers in FullList
+    for i in range(a,b+1):
+        sumList=[getSum(i),getSquareSum(i)]
+        FullList.append(sumList)
+
+    # Declaring a counter
+    counter=0
+
+    # For loop for storing all lucky numbers into primeList
+    for i in range(a,b+1):
+        if checkPrime(FullList[counter][0]) and checkPrime(FullList[counter][1]):
+            primeList.append(i)
+        counter+=1
+
+    #return primeList
+    return primeList
+
+# MAIN
+
+# Taking input from users
+a=int(input("Enter the lower bound number :"))
+b=int(input("Enter the upper bound number :"))
+
+# Calling lucky_number function
+listLucky=lucky_number(a,b)
+
+# Printing values of lucky number
+if len(listLucky)==0:
+    print("There is no lucky number in your range.")
+elif len(listLucky)==1:
+    print(f"There is only one Lucky Number that is : {listLucky[0]}",end="")
+else:
+    print("Lucky Numbers are : ",end="")
+    for number in listLucky:
+        print(f"{number}, ",end="")
+
+#OUTPUT
+# Enter the lower bound number :1
+# Enter the upper bound number :20
+# Lucky Numbers are : 11, 12, 14, 16,