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Mar 23rd, 2018
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  1. #take input from the user
  2.  
  3. num = int(input("Enter a number: "))
  4.  
  5. # prime numbers are greater than 1
  6.  
  7. if num > 1:
  8.  
  9. #check for factors
  10.  
  11. for i in range(2,num):
  12. if (num % i) == 0:
  13. print(num,"is not a prime number")
  14. print(i,"times",num//i,"is",num)
  15. break
  16. else:
  17. print(num,"is a prime number")
  18.  
  19. # if the input number is less than or equal to 1, it is not prime
  20.  
  21. else: print(num,"is not a prime number")
  22.  
  23. import json
  24. # make sample dict with comprehension
  25. dict1 = {k: v for (k, v) in enumerate(range(10))}
  26. json1 = json.dumps(dict1)
  27.  
  28. '{"0": 0, "1": 1, "2": 2, "3": 3, "4": 4, "5": 5, "6": 6, "7": 7, "8": 8, "9": 9}'
  29.  
  30. import json
  31. #take input from the user
  32.  
  33. num = int(input("Enter a number: "))
  34.  
  35. # prime numbers are greater than 1
  36.  
  37. if num > 1:
  38.  
  39. #check for factors
  40. prime_numbers = []
  41. not_prime = []
  42. for i in range(2,num):
  43. if (num % i) == 0:
  44. print(num,"is not a prime number")
  45. print(i,"times",num//i,"is",num)
  46. not_prime.append(num)
  47. break
  48. else:
  49. prime_numbers.append(num)
  50. print(num,"is a prime number")
  51.  
  52.  
  53. fh = open("my_json.json", "a+")
  54. fh.write(json.dumps({"prime": prime_numbers, "not_prime": not_prime})
  55. fh.close()
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