What is wrong with my code? (Solved)

Question

https://code.sololearn.com/cJ0JqmtjZfQ9/?ref=app

For a few multiples of 3 the code gives the result as prime

Answer 1

# Priyangshu your actual code still has a corner case (wich isn't corrected in most of other answers) for num == 0 (output both of "0 is not prime" and "0 is prime")...

# fixed code:

num = int(input())

if num == 0 or num == 1:
print(num,"is not prime")

else:

for i in range(2,num):
if num % i == 0:
print(num,"is not prime")
break

else:
print(num,"is prime")

Answer 2

for i in range(2,num):
if num % i == 0:
print(num,"is not prime")
break

else:
print(num,"is prime")

Answer 3

Remove break from else statement and print() too.

Using break in both if and else made the loop to run only one time.

For 39
39%2!= 0 and it is printing 39 as prime.

Answer 4

Pariket What difference does the space make?

Answer 5

Priyangshu algorithm behind the solution of Simba sir is

for i in range():
if :
.......
else:
.......
else:
This block will run when the for loop finishes normally (no break)

for 39 => 39%3 == 0 => prints "not prime" and breaks the loop and the loop isn't finished normally so else after for loop won't run .

for 5 => the loop finishes normally not reaching any break so last else gets executed and print "is prime" .

Answer 6

Simba The code is working perfectly now.

But if I place the else statement just under the if statement then the code shows 2 results.

for i in range(2,num):
if num % i == 0:
print(num,"is not prime")
break

else:
print(num,"is prime")

The result it gives is:
21 is prime
21 is not prime

Why is it so? Doesn't the 'break' stop the execution of the else statement?

Answer 7

https://code.sololearn.com/c6Wbmle0X7O2/?ref=app

https://code.sololearn.com/cyGIIyTHcw0G/?ref=app

Answer 8

https://code.sololearn.com/cKlc8Rfg8t4B/?ref=app

Answer 9

https://code.sololearn.com/cANRpO4Gw63e/?ref=app

Answer 10

Priyangshu Please have a look at this:

https://code.sololearn.com/ct3YOcp5VfHt/?ref=app

Answer 11

for i in range(2,num):
if num % i == 0:
print(num,"is not prime")
break
else:
print(num, "is prime")

#fixed

Answer 12

solved pls

Answer 13

Hiii