TypeScript
/**
* Can only be divisible by one or itself.
*
* We can check if a number is divisible by another one by using modulus, like so:
*
* ```typescript
* possiblePrime % 2 === 0 // possiblePrime is evenly divisible by 2
* ```
*
* There is one caveat which is that we need to handle the case where the users passes in an
* argument of 1 which can never be a prime number. We can handle this by simply returning early
* from the function in this case
*
* @param possiblePrime Possible prime number.
*/
const isPrime = (possiblePrime: number) => {
if (possiblePrime === 1) {
return false;
}
for (let i = 2; i < possiblePrime; i += 1) {
if (possiblePrime % i === 0) {
return false;
}
}
return true;
};
console.log(isPrime(7));