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Challenges How many odd digits?

Given a positive integer, count its odd digits. Input An integer from 1 to 999,999,999, inclusive, in any of the following formats: A number (such as an integer or floating point number), li...

6 answers  ·  posted 3mo ago by trichoplax‭  ·  last activity 2mo ago by Shaggy‭

Question code-golf number
#2: Post edited by user avatar trichoplax‭ · 2024-08-28T01:05:33Z (3 months ago)
Make input format more flexible
  • Given a positive integer, count its odd digits.
  • ## Input
  • - An integer from 1 to 999,999,999, inclusive.
  • ## Output
  • - The number of odd digits in the input.
  • ## Test cases
  • Test cases are in the format `input : output`.
  • ```text
  • 1 : 1
  • 2 : 0
  • 3 : 1
  • 4 : 0
  • 5 : 1
  • 6 : 0
  • 7 : 1
  • 8 : 0
  • 9 : 1
  • 10 : 1
  • 11 : 2
  • 12 : 1
  • 13 : 2
  • 14 : 1
  • 15 : 2
  • 16 : 1
  • 17 : 2
  • 18 : 1
  • 19 : 2
  • 20 : 0
  • 111111111 : 9
  • 222222222 : 0
  • 123456789 : 5
  • 999999999 : 9
  • ```
  • ## Scoring
  • This is a [code golf challenge]. Your score is the number of bytes in your code. Lowest score for each language wins.
  • > Explanations are optional, but I'm more likely to upvote answers that have one.
  • [code golf challenge]: https://codegolf.codidact.com/categories/49/tags/4274 "The code-golf tag"
  • Given a positive integer, count its odd digits.
  • ## Input
  • - An integer from 1 to 999,999,999, inclusive, in any of the following formats:
  • - A number (such as an integer or floating point number), like `123`.
  • - A string, like `"123"`.
  • - A sequence of characters (such as an array or list), like `['1', '2', '3']`.
  • - A sequence of single digit numbers, like `[1, 2, 3]`.
  • ## Output
  • - The number of odd digits in the input.
  • ## Test cases
  • Test cases are in the format `input : output`.
  • ```text
  • 1 : 1
  • 2 : 0
  • 3 : 1
  • 4 : 0
  • 5 : 1
  • 6 : 0
  • 7 : 1
  • 8 : 0
  • 9 : 1
  • 10 : 1
  • 11 : 2
  • 12 : 1
  • 13 : 2
  • 14 : 1
  • 15 : 2
  • 16 : 1
  • 17 : 2
  • 18 : 1
  • 19 : 2
  • 20 : 0
  • 111111111 : 9
  • 222222222 : 0
  • 123456789 : 5
  • 999999999 : 9
  • ```
  • ## Scoring
  • This is a [code golf challenge]. Your score is the number of bytes in your code. Lowest score for each language wins.
  • > Explanations are optional, but I'm more likely to upvote answers that have one.
  • [code golf challenge]: https://codegolf.codidact.com/categories/49/tags/4274 "The code-golf tag"
#1: Initial revision by user avatar trichoplax‭ · 2024-08-26T22:41:23Z (3 months ago)
How many odd digits?
Given a positive integer, count its odd digits.

## Input
- An integer from 1 to 999,999,999, inclusive.

## Output
- The number of odd digits in the input.

## Test cases
Test cases are in the format `input : output`.

```text
1 : 1
2 : 0
3 : 1
4 : 0
5 : 1
6 : 0
7 : 1
8 : 0
9 : 1
10 : 1
11 : 2
12 : 1
13 : 2
14 : 1
15 : 2
16 : 1
17 : 2
18 : 1
19 : 2
20 : 0
111111111 : 9
222222222 : 0
123456789 : 5
999999999 : 9
```

## Scoring
This is a [code golf challenge]. Your score is the number of bytes in your code. Lowest score for each language wins.

> Explanations are optional, but I'm more likely to upvote answers that have one.


[code golf challenge]: https://codegolf.codidact.com/categories/49/tags/4274 "The code-golf tag"