Files

- main.py

main.py

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

```
def isPrime(number):
# assume prime unless we find a factor
prime = True
# primes (after 5) don't end in 2,4,5,6,8 or 0
if number > 5 and str(number)[-1] in "245680":
prime = False
else:
# starting with 2...
factor = 2
# ...and going up to the square root
root = int(number**0.5)
# keep going until we find a factor or we've tried all numbers
while prime and factor <= root:
# try factor to see whether it divides exactly...
if number % factor == 0:
# ...if so, then it's not prime
prime = False
factor += 1
return prime
print("Number\tPrime\n======\t=====")
# count from 2 to 100 and show whether number is prime
for n in range(2,101):
print(n,"\t"+str(isPrime(n)))
```