Count the number of vowels in a file using Python

Count the number of vowels in a file using Python

Problem description :

The program reads a text file entered by the user and counts the number of vowels in the text file.

Prerequisite : Files concepts

Procedure :

1. Start.
2. Read the file.
3. Store the file in a string.
4. initialize a count variable.
5. Iterate through the string.
6. check if the character is a vowel.
7. increment the count variable.
8. End.

Input file :

demofile.txt

Techieebytes is a tech blog where you can find lot of programming exercises and solutions. The programming exercise can be solved in any of the programming language. In this program we are going to  count the number of vowels in a text file.

Code :

#Method 1 (using or operator)

#open the text file in read mode

f = open("demofile.txt", "r")

#read the file and the contents will be stored as string in s.

s = f.read()

#initialize count variable

count = 0

for i in s:

        #if the letter is a vowel

if(i=="a" or i=="e" or i=="i" or i=="o" or i=="u"):

                #increment count

count+=1

#print vowel count

print("Number of vowels = ",count)

#Method 2 (using list)

#open the text file in read mode

f = open("demofile.txt", "r")

#read the file and the contents will be stored as string in s.

s = f.read()

#initialize count variable

count = 0

for i in s:

        #if the letter is in the list containing vowels

if(i in ["a","e","i","o","u"]):

                #increment count

count+=1

#print vowel count

print("Number of vowels = ",count)

#Method 3 (using set)

#open the text file in read mode

f = open("demofile.txt", "r")

#read the file and the contents will be stored as string in s.

s = f.read()

#initialize count variable

count=0

#create a set of vowels

vowel = set("aeiou")

for i in s:

        #if the letter in vowel set

if(i in vowel):

                #increment count

count+=1

#print vowel count

print("Number of vowels = ",count)

Sample input :

demofile.txt

Sample output :

Output