Check if a number is odd

JavaScript version

const isOdd = (n) => n % 2 !== 0;

// Or
const isOdd = (n) => !!(n & 1);

// Or
const isOdd = (n) => !Number.isInteger(n / 2);

TypeScript version

const isOdd = (n: number): boolean => n % 2 !== 0;

// Or
const isOdd = (n: number): boolean => !!(n & 1);

// Or
const isOdd = (n: number): boolean => !Number.isInteger(n / 2);

Examples

isOdd(1); // true
isOdd(2); // false