Program to count the number of vowels in a word

Write a program to count the number of vowels in a given word. Vowels include 'a', 'e', 'i', 'o', and 'u' (both uppercase and lowercase). The program should output the count of vowels in the word.

Examples:

Input: "programming"
Output: 3
Explanation: The word "programming" has three vowels ('o', 'a', 'i').

Input: "HELLO"
Output: 2
Explanation: The word "HELLO" has two vowels ('E', 'O').

Approach: To solve the problem, follow the below idea:

Iterate through each character in the given word and check if it is a vowel. If it is, increment the count.

Step-by-step algorithm:

• Initialize a variable vowelCount to 0 to keep track of the number of vowels.
• Iterate through each character in the word.
• Check if the character is a vowel (either uppercase or lowercase).
• If it is a vowel, increment vowelCount.
• After iterating through all characters, vowelCount will contain the total count of vowels.

Below is the implementation of the algorithm:

Number of vowels: 3

Time Complexity: O(N), where N is the length of the input word.
Auxiliary Space: O(1)