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Python: Find the value of n where n degrees of number 2 are written sequentially in a line without spaces

Python Basic - 1: Exercise-19 with Solution

Write a Python program to find the value of n where n degrees of number 2 are written sequentially in a line without spaces.

Pictorial Presentation:

Python: Find the value of n where n degrees of number 2 are written sequentially in a line without spaces

Sample Solution:

Python Code:

def ndegrees(num):
  ans = True
  n, tempn, i = 2, 2, 2
  while ans:
    if str(tempn) in num:
      i += 1
      tempn = pow(n, i)
    else:
      ans = False
  return i-1;
print(ndegrees("2481632"))
print(ndegrees("248163264"))

Sample Output:

5
6

Flowchart:

Flowchart: Python - Find the value of n where n degrees of number 2 are written sequentially in a line without spaces

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Previous: Write a Python program to find the median among three given numbers
Next: Write a Python program to find the number of zeros at the end of a factorial of a given positive number.

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Python: Tips of the Day

Iterating over dictionaries using 'for' loops:

I am a bit puzzled by the following code: d = {'x': 1, 'y': 2, 'z': 3} for key in d: print key, 'corresponds to', d[key] What I don't understand is the key portion. How does Python recognize ...

key is just a variable name.

for key in d:

For Python 3.x:

for key, value in d.items():

For Python 2.x:

for key, value in d.iteritems():

To test for yourself, change the word key to poop.

In Python 3.x, iteritems() was replaced with simply items(), which returns a set-like view backed by the dict, like iteritems() but even better. This is also available in 2.7 as viewitems().

The operation items() will work for both 2 and 3, but in 2 it will return a list of the dictionary's (key, value) pairs, which will not reflect changes to the dict that happen after the items() call. If you want the 2.x behavior in 3.x, you can call list(d.items()).

Ref: https://bit.ly/37dm0Qo