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Given a string, count the number of vowels present in given string using Sets.
Prerequisite: Sets in Python
Examples:
Input : GeeksforGeeks Output : No. of vowels : 5 Input : Hello World Output : No. of vowels : 3
Recommended: Please try your approach on {IDE} first, before moving on to the solution.
Approach:
1. Create a set of vowels using set[] and initialize a count variable to 0.
2. Traverse through the alphabets in the string and
check if the letter in the string is present in set vowel.
3. If it is present, the vowel count is incremented.
Below is the implementation of above approach:
def
vowel_count[
str
]:
count
=
0
vowel
=
set
[
"aeiouAEIOU"
]
for
alphabet
in
str
:
if
alphabet
in
vowel:
count
=
count
+
1
print
[
"No. of vowels :"
, count]
str
=
"GeeksforGeeks"
vowel_count[
str
]
Output:
No. of vowels : 5
This is a Python Program to count the number of vowels in a string. Problem Description The program takes a string and counts the number of vowels in a string. Problem Solution 1. Take a string from the user and store it in a variable. Program/Source Code Here is source code of the Python Program to remove the nth index character from a non-empty string. The program output is also shown below.
2. Initialize a count variable to 0.
3. Use a for loop to traverse through the characters in the
string.
4. Use an if statement to check if the character is a vowel or not and increment the count variable if it is a vowel.
5. Print the total number of vowels in the string.
6. Exit.string=raw_input["Enter string:"]
vowels=0
for i in string:
if[i=='a' or i=='e' or i=='i' or i=='o' or i=='u' or i=='A' or i=='E' or i=='I' or i=='O' or i=='U']:
vowels=vowels+1
print["Number of vowels are:"]
print[vowels]
Program Explanation
1. User must enter a string and store it in a variable.
2. The count
variable is initialized to zero.
3. The for loop is used to traverse through the characters in the string.
4. An if statement checks if the character is a vowel or not.
5. The count is incremented each time a vowel is encountered.
6. The total count of vowels in the string is printed.
Runtime Test Cases
Case 1: Enter string:Hello world Number of vowels are: 3 Case 2: Enter string:WELCOME Number of vowels are: 3
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