Why code is showing syntax error..?

Question

1.00/5 (2 votes)

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Python

<pre>num = int(input('enter number:'))
if num <= 2:
    if num == 2:
        print(('Yes, it is a prime number')
    else : 
        print('No, it is not a prime number')
else :
    for i in range(2,num) :    
        if (num % i) == 0:
            print('No, it is not a prime number')
            break
        else :
            print('Yes, it is a prime number')   
            break

What I have tried:

Python

<pre>num = int(input('enter number:'))
if num <= 2:
    if num == 2:
        print(('Yes, it is a prime number')
    else : 
        print('No, it is not a prime number')
else :
    for i in range(2,num) :    
        if (num % i) == 0:
            print('No, it is not a prime number')
            break
        else :
            print('Yes, it is a prime number')   
            break

Posted 10-Dec-20 5:57am

Member 15012793

Updated 10-Dec-20 9:19am

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Comments

CHill60 10-Dec-20 12:14pm

What is the error reported?

Richard Deeming 10-Dec-20 12:16pm

What error, and on what line?

NB: You have a logic error in your code. For example, if you enter 4, which is not a prime number, you will print out:
* No, it is not a prime number
* Yes, it is a prime number

For larger numbers, the problem will be worse.

Step through your code in a debugger, and it should be obvious why that's happening.

2 solutions

Solution 2

In addition to Solution 1.
Chabge your code to:

Python

num = int(input('enter number:'))
if num <= 2:
    if num == 2:
        print('Yes, it is a prime number')
    else : 
        print('No, it is not a prime number')
else :
    for i in range(2,num) :    
        print(i) # to print each divisor tested
        if (num % i) == 0:
            print('No, it is not a prime number')
            break
        else :
            print('Yes, it is a prime number')   
            break

you should get a surprise. Input 9, just to see.

Posted 10-Dec-20 9:19am

Patrice T

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CHill60 · Accepted Answer · 2020-12-10T06:30:00

Solution 1

You have an unclosed bracket on line 5

Python

print(('Yes, it is a prime number')

That should either be

Python

print('Yes, it is a prime number')

or

Python

print(('Yes, it is a prime number'))

Posted 10-Dec-20 6:30am

CHill60