Return to Answer

JavaScript ES6, 61

s=prompt()
alert((s.charCodeAt(0)- -s[1])%2?"light":"dark")

Extracts the number and the ASCII code of the letter, adds them and checks if even/odd. This can accept input in the form a1 and A1

JavaScript ES6, 59 56

s=prompt()
alert((s.charCodeAt()^s[1])%2?"light":"dark")

Extracts the number and the ASCII code of the letter, adds them and checks if even/odd. This can accept input in the form a1 and A1

3 bytes saved thanks to Neil!

JavaScript ES6, 61

s=prompt()
alert((s.charCodeAt(0)- -s[1])%2?"light":"dark")

Adds the number and the ASCII code of the letter, adds them and checks if even/odd. This can accept input in the form a1 and A1

JavaScript ES6, 61

s=prompt()
alert((s.charCodeAt(0)- -s[1])%2?"light":"dark")

Extracts the number and the ASCII code of the letter, adds them and checks if even/odd. This can accept input in the form a1 and A1

JavaScript ES6, 44

s=>(s.charCodeAt(0)- -s[1])%2?"light":"dark"

This creates an arrow function that takes input as a string. Note: it cannot technically be called in this form, as there is no way to reference it. To fix this, add l= at the beginning, and then call it like l("a1")

JavaScript ES6, 61

s=prompt()
alert((s.charCodeAt(0)- -s[1])%2?"light":"dark")

Adds the number and the ASCII code of the letter, adds them and checks if even/odd. This can accept input in the form a1 and A1