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Practice Problems in Python [ Part - 1 ]

                                    Python

1. Write a program which will find all such numbers which are divisible by 3 but are not a multiple of 7,between 2000 and 3200 (both included).

soln : 
        def filter_numbers():
        """
        function to filter out numbers by extracting numbers
        which is divisible by 3 but not multiple of 7.
        """
        filtered_list=[]
        for i in range(2000, 3201):
            if (i%3==0) and (i%7!=0):
                filtered_list.append(str(i))
        print(','.join(filtered_list))

2. Write a program which can compute the factorial of a given numbers.

soln :

def fact(x):
"""
function to get factorial of given number
"""
    if x == 0:
        return 1
    return x * fact(x - 1)

x=int(raw_input())
print fact(x)


3. Write a program, which will find all such numbers between 1000 and 3000 (both included) such that each digit of the number is an even number.

soln : 
def even_digit_finder():
"""
function is to filter out numbers in 
which each digit is even number.
"""
even_digit_in_number = []
for i in range(1000, 3001):
    s = str(i)
    if (int(s[0])%2==0) and (int(s[1])%2==0) and (int(s[2])%2==0) and (int(s[3])%2==0):
        even_digit_in_number.append(s)
print(",".join(even_digit_in_number))



4. Write a program that accepts a sentence and calculate the number of letters and digits.

soln : 
def digit_character_counter():
"""
"""
sentence = input("enter sentence")
counter={"DIGITS":0, "LETTERS":0}
for character in sent:
    if character.isdigit():
        counter["DIGITS"]+=1
    elif character.isalpha():
        counter["LETTERS"]+=1
    else:
        pass
print("Total number of letters is {}".format(counter["LETTERS"]))
print("Total number of letters is {}".format(counter["DIGITS"]))






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