prime.not

PRINT "Enter number to check if it is prime or not: "
INPUT number

IF number == 1
{
    PRINT "1 is neither prime nor composite"
    RETURN 0
}

LET i = 2

WHILE i <= number / 2
{
    IF number % i == 0
    {
        PRINT number " is not a prime number"
        RETURN 0
    }

    LET i = i + 1
}

PRINT number " is a prime number"