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This simple C program asks the user to enter a line of text and then counts how many vowels (A, E, I, O, U) it contains.
It checks both uppercase and lowercase letters, making it easy to understand how to work with strings, loops, and conditional statements in C.
It’s a great beginner exercise for learning how characters are stored in arrays, how loops read each character one by one, and how to use if conditions to compare values.