Explain this code:

var numArray = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]

var primeArray = []

function isPrime(number = []){

for (var i = 0; i < number.length; i++) {

if (number[i] === 2 && number[i]!= 1) {

primeArray.push(number[i])

console.log("This is a prime number");

console.log(number[i]);

}

else if (number[i] % 2 != 0 && number[i]!= 1){

primeArray.push(number[i])

console.log("This is a prime number");

console.log(number[i]);

}

else{

console.log("This is not a prime number")

console.log(number[i]);

}

}

}

isPrime(numArray)

console.log(" ")

console.log("Prime Array")

console.log(primeArray)