<Codesignal> variableName

Easy

Correct variable names consist only of English letters, digits and underscores and they can't start with a digit.

Check if the given string is a correct variable name.

Example

• For name = "var_1__Int", the output should be
  variableName(name) = true;
• For name = "qq-q", the output should be
  variableName(name) = false;
• For name = "2w2", the output should be
  variableName(name) = false.

Input/Output

• [execution time limit] 0.5 seconds (c)

• [input] string name

  Guaranteed constraints:
  1 ≤ name.length ≤ 10.

• [output] boolean

  • true if name is a correct variable name, false otherwise.

[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

bool variableName(char *name)
{
	if(isdigit(name[0]))
		return false;
	for(int i=0;i<strlen(name);i++)
		if(!(isalnum(name[i]) || name[i]=='_'))
			return false;

	return true;
}