The SMartty Lib is a demonstration practice application designed to showcase how to create an NPM package. It serves as a versatile library for practicing various checks, including identifying even numbers, odd numbers, consonants, and vowels.

• Description: Checks if a given number is even.
• Example:
  • isEven(1) returns false.
  • isEven(2) returns true.

• Description: Checks if a given number is odd.
• Example:
  • isOdd(1) returns true.
  • isOdd(2) returns false.

• Description: Checks if a given letter is a vowel.
• Example:
  • isVowel("a") returns true.
  • isVowel("b") returns false.

• Description: Checks if a given letter is a consonant.
• Example:
  • isConsonant("a") returns false.
  • isConsonant("b") returns true.