Priemgetal
getal = int(input("Getal: "))
isPriemgetal = True
if getal < 1:
print("Geen priemgetal.")
else:
if getal < 4:
print("Priemgetal.")
else:
helft = getal / 2
deler = 2
while deler <= helft and getal % deler != 0:
deler += 1
if deler > helft:
print("Priemgetal.")
else:
print("Geen priemgetal.")