Python Exercise: Test the number is prime or not
Python Functions: Exercise-9 with Solution
Write a Python function that takes a number as a parameter and check the number is prime or not.
Note : A prime number (or a prime) is a natural number greater than 1 and that has no positive divisors other than 1 and itself.

Prime number between 1 to 100:

Sample Solution-1:
Python Code:
def test_prime(n):
if (n==1):
return False
elif (n==2):
return True;
else:
for x in range(2,n):
if(n % x==0):
return False
return True
print(test_prime(9))
Sample Output:
False
Flowchart:

Visualize Python code execution:
The following tool visualize what the computer is doing step-by-step as it executes the said program:
Sample Solution-2:
- Return False if the number is 0, 1, a negative number or a multiple of 2.
- Use all() and range() to check numbers from 3 to the square root of the given number.
- Return True if none divides the given number, False otherwise.
Python Code:
from math import sqrt
def is_prime(num):
if num <= 1 or (num % 2 == 0 and num > 2):
return False
return all(num % i for i in range(3, int(sqrt(num)) + 1, 2))
print(is_prime(11))
print(is_prime(13))
print(is_prime(16))
print(is_prime(17))
print(is_prime(97))
Sample Output:
True True False True True
Flowchart:

Visualize Python code execution:
The following tool visualize what the computer is doing step-by-step as it executes the said program:
Python Code Editor:
Have another way to solve this solution? Contribute your code (and comments) through Disqus.
Previous: Write a Python function that takes a list and returns a new list with unique elements of the first list.
Next: Write a Python program to print the even numbers from a given list.
What is the difficulty level of this exercise?
Test your Programming skills with w3resource's quiz.
Python: Tips of the Day
Decapitalizes the first letter of a string:
Example:
def tips_decapitalize(s, upper_rest=False): return s[:1].lower() + (s[1:].upper() if upper_rest else s[1:]) print(tips_decapitalize('PythonTips')) print(tips_decapitalize('PythonTips', True))
Output:
pythonTips pYTHONTIPS
- New Content published on w3resource:
- HTML-CSS Practical: Exercises, Practice, Solution
- Java Regular Expression: Exercises, Practice, Solution
- Scala Programming Exercises, Practice, Solution
- Python Itertools exercises
- Python Numpy exercises
- Python GeoPy Package exercises
- Python Pandas exercises
- Python nltk exercises
- Python BeautifulSoup exercises
- Form Template
- Composer - PHP Package Manager
- PHPUnit - PHP Testing
- Laravel - PHP Framework
- Angular - JavaScript Framework
- Vue - JavaScript Framework
- Jest - JavaScript Testing Framework