CODEWITHSUNDEEP
python
Joseph
Joseph

Reputation: 45

Python counting positive integers

How would I change this in order to count the number of sevens in a positive integer.

num = int(input("Enter a positive integer: "))

while num >= 1:
    digit = num % 10
    num = num//10
    print(digit)

Upvotes: 0

Views: 271

Answers (2)

Óscar López
Óscar López

Reputation: 236004

Using your code as a basis, just declare a variable to count the sevens, and increment it when the current digit is a seven:

sevens = 0
while num >= 1:
    digit = num % 10
    if digit == 7:
        sevens += 1
    num = num // 10
print(sevens)

Of course, there are more pythonic ways to do this:

num = input('Enter a positive integer: ')
print(num.count('7'))

Upvotes: 2

Sri
Sri

Reputation: 2328

You could convert it to a string, then use the count function.

num = int(input("Enter a positive integer: "))
print(str(num).count('7'))

Upvotes: 0

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