<Codesignal> Character Parity

Easy

Given a character, check if it represents an odd digit, an even digit or not a digit at all.

Example

• For symbol = '5', the output should be
  characterParity(symbol) = "odd";
• For symbol = '8', the output should be
  characterParity(symbol) = "even";
• For symbol = 'q', the output should be
  characterParity(symbol) = "not a digit".

Input/Output

• [execution time limit] 0.5 seconds (c)

• [input] char symbol

  A symbol to check.

  Guaranteed constraints:
  symbol is guaranteed to be a UTF-8 symbol.

• [output] string

[C] Syntax Tips

// Prints help message to the console
// Returns a string
char * helloWorld(char * name) {
    char * answer = malloc(strlen(name) + 8);
    printf("This prints to the console when you Run Tests");
    strcpy(answer, "Hello, ");
    strcat(answer, name);
    return answer;
}

---

Solution

char *characterParity(char symbol)
{
	if(!isdigit(symbol))
		return "not a digit";
	else if((symbol-'0')%2==0)
		return "even";
	else
		return "odd";
}