Time Difference

Amateur Hour

Challenge Difficulty: Easy | Estimated completion time: ~10 minutes

Write a function that takes time t1 and time t2 and returns the number of hours passed between the two times.

Examples

hoursPassed("3:00 AM", "9:00 AM")
output = "6 hours"
 
hoursPassed("2:00 PM", "4:00 PM")
output = "2 hours"
 
hoursPassed("1:00 AM", "3:00 PM")
output = "14 hours"
 
hoursPassed("4:00 PM", "4:00 PM")
output = "no time passed"

Notes

• Time t1 will always be the starting time and t2, the ending time.
• Return the string "no time passed" if t1 is equal to t2.

Solution

Python

def hours_passed(time_start: str, time_end: str) -> str: """Calculate hours passed between two times. Args: time_start: Starting time in format "H:MM AM/PM" time_end: Ending time in format "H:MM AM/PM" Returns: String describing hours passed or "no time passed" """ def parse_time(time_string: str) -> int: time_part, period = time_string.rsplit(" ", 1) hour, _ = map(int, time_part.split(":")) if period == "AM": return hour if hour != 12 else 0 else: return hour if hour <span class="text-highlight"> 12 else hour + 12 if time_start </span> time_end: return "no time passed" hours = parse_time(time_end) - parse_time(time_start) return f"{hours} hours" if hours != 1 else "1 hour" if __name__ == "__main__": print(hours_passed("3:00 AM", "9:00 AM")) # 6 hours print(hours_passed("2:00 PM", "4:00 PM")) # 2 hours print(hours_passed("1:00 AM", "3:00 PM")) # 14 hours print(hours_passed("4:00 PM", "4:00 PM")) # no time passed

Output