Update nlargestprime.py

Author: japneetkaurbhatia

Python/n-digit-largestprime/nlargestprime.py

@@ -2,14 +2,15 @@
 
 from math import sqrt 
 MAX = 100000000
-prime = [True] * (MAX + 1)  
+prime = [True] * (MAX + 1) 
 
 def SieveOfEratosthenes() :  
     for p in range(2, int(sqrt(MAX)) + 1) :  
         if (prime[p] == True) : 
             for i in range(p * p, MAX + 1, p) : 
                 prime[i] = False
- 
+
+#function to find largest prime number		
 def largestPrime(d) :  
     l = 10 ** (d - 1) 
     r = (10 ** d) - 1  
@@ -18,7 +19,8 @@ def largestPrime(d) :
             return i            
     return -1  
 
+#driver code
 if __name__ == "__main__" : 
-	N = int(input("Enter N digit"))
-	SieveOfEratosthenes()  
-	print(largestPrime(N)) 
+	N = int(input("Enter N digit")) #input
+	SieveOfEratosthenes()  #call to SieveOfEratosthenes() function
+	print(largestPrime(N)) #call to function and output