primes.lala

function is-prime(var value: int): bool {
    if (value < 2)
        return false

    var i: int = 2
    while (i <= value / 2) {
        if (value % i == 0)
            return false
        i = i + 1
    }

    return true
}

function print-primes-in-range(var start: int, var end: int): void {
    print 'Primes from ' + start: string + ' to ' + end: string + ':'

    var i: int = start
    while (i <= end) {
        if is-prime(i)
            print i
        i = i + 1
    }
}

print 'Calculates prime numbers from a to b.'
print 'Enter a b:'
print-primes-in-range(read int, read int)