Count a Character in a String

## Count a Character in a String Implement `number_of_character(string, char)`. - `string` is the input string. - `char` is the single character whose occurrences you must count. Return an integer giving the number of times `char` appears in `string`. Comparison is case-sensitive: uppercase and lowercase forms are different characters. Count every matching occurrence, including repeated adjacent occurrences. Return zero if the input string contains no occurrence of `char`, including when the input string is empty. The returned count is a scalar, so its value is the complete output.