Swift - Data Types
You want to create a Swift function that counts how many vowels are in a given String. Which approach correctly uses Character and String types?
You want to create a Swift function that counts how many vowels are in a given String. Which approach correctly uses Character and String types?
hard📝 Application Q15 of 15
Step-by-Step Solution
Solution:
Step 1: Understand the problem
We need to check each letter in a String to see if it is a vowel.Step 2: Choose correct types and method
Iterating over a String gives Characters one by one, which can be checked against vowels.Step 3: Analyze options
Iterate over the String's characters and check if each Character is a vowel correctly describes iterating over Characters in a String. Options A, B, and D misuse types or concepts.Final Answer:
Iterate over the String's characters and check if each Character is a vowel -> Option AQuick Check:
Check each Character in String for vowels [OK]
Quick Trick: Loop over String characters to check each letter [OK]
Common Mistakes:
- Trying to convert String to Int for counting
- Using Character to hold whole String
- Using Bool incorrectly to count vowels
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