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93 lines
2.0 KiB
Markdown
93 lines
2.0 KiB
Markdown
---
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id: 698a1a73ade5ac0e19180fa1
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title: "Challenge 198: Business Day Count"
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challengeType: 29
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dashedName: challenge-198
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---
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# --description--
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Given a start date and an end date, return the number of business days between the two.
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- Given dates are in the format `"YYYY-MM-DD"`.
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- Weekdays are business days (Monday through Friday).
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- Weekends are not business days (Saturday and Sunday).
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- Include both the start and end dates when counting.
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# --hints--
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`count_business_days("2026-02-24", "2026-02-26")` should return `3`.
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```js
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({test: () => { runPython(`
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from unittest import TestCase
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TestCase().assertEqual(count_business_days("2026-02-24", "2026-02-26"), 3)`)
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}})
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```
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`count_business_days("2026-02-24", "2026-02-28")` should return `4`.
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```js
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({test: () => { runPython(`
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from unittest import TestCase
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TestCase().assertEqual(count_business_days("2026-02-24", "2026-02-28"), 4)`)
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}})
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```
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`count_business_days("2026-02-21", "2026-03-01")` should return `5`.
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```js
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({test: () => { runPython(`
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from unittest import TestCase
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TestCase().assertEqual(count_business_days("2026-02-21", "2026-03-01"), 5)`)
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}})
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```
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`count_business_days("2026-03-08", "2026-03-17")` should return `7`.
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```js
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({test: () => { runPython(`
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from unittest import TestCase
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TestCase().assertEqual(count_business_days("2026-03-08", "2026-03-17"), 7)`)
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}})
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```
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`count_business_days("2026-02-24", "2027-02-24")` should return `262`.
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```js
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({test: () => { runPython(`
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from unittest import TestCase
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TestCase().assertEqual(count_business_days("2026-02-24", "2027-02-24"), 262)`)
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}})
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```
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# --seed--
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## --seed-contents--
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```py
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def count_business_days(start, end):
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return start
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```
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# --solutions--
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```py
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from datetime import datetime, timedelta
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def count_business_days(start, end):
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start_date = datetime.strptime(start, "%Y-%m-%d")
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end_date = datetime.strptime(end, "%Y-%m-%d")
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count = 0
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current = start_date
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while current <= end_date:
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if current.weekday() < 5:
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count += 1
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current += timedelta(days=1)
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return count
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```
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