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Python: Count the number 4 in a given list

Python Basic: Exercise-22 with Solution

Write a Python program to count the number 4 in a given list.

Pictorial Presentation:

Count the number 4 in a given list

Sample Solution:-

Python Code:

def list_count_4(nums):
  count = 0  
  for num in nums:
    if num == 4:
      count = count + 1

  return count

print(list_count_4([1, 4, 6, 7, 4]))
print(list_count_4([1, 4, 6, 4, 7, 4]))

Sample Output:

2                                                                                                             
3 

Flowchart:

Flowchart: Count the number 4 in a given list.

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Previous: Write a Python program to find whether a given number (accept from the user) is even or odd, print out an appropriate message to the user.
Next: Write a Python program to get the n (non-negative integer) copies of the first 2 characters of a given string. Return the n copies of the whole string if the length is less than 2.

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Python: Tips of the Day

Unpack variables from iterable:

# One can unpack all iterables (tuples, list etc)
>>> a, b, c = 1, 2, 3
>>> a, b, c
(1, 2, 3)

>>> a, b, c = [1, 2, 3]
>>> a, b, c
(1, 2, 3)