Count Letter Function

MEDIUMProcedures & Functions7 marks

Write function CountLetter(Text, Target) that returns how many times the character Target appears in Text. The check must be case-insensitive (A and a both count).

Input: A string, then a single-character string. Output: The count.

Example:

Input:  Banana
        a
Output: 3

Sample Test Cases

Test 1: Three a/A letters

Inputs: Banana, a

Expected: 3

Test 2: Uppercase target still matches

Inputs: Banana, A

Expected: 3

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