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Added interesting code (uses for...else clause) #42

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20 changes: 20 additions & 0 deletions python/Longest Increasing Subsequence/countprimes.py
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Original file line number Diff line number Diff line change
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#Count primes in a range

def count_primes2(num):
primes = [2]
x = 3
if num < 2:
return 0
while x <= num:
for y in primes: # use the primes list!
if x%y == 0:
x += 2
break
else:
primes.append(x)
x += 2
print(primes)
return len(primes)

num= int(input("Enter limit: "))
count_primes2(num)